Filter assembly

ABSTRACT

A filter unit includes a body portion that receives a water filter. An engaging portion is coupled to the body portion. A bypass actuator rotates relative to the engaging portion to rotationally and axially operate a bypass valve of a fluid manifold. The bypass actuator drives axial engagement of the engaging portion with a valve assembly of the fluid manifold. The bypass actuator extends through the body portion and the engaging portion.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/162022/054007, filed on Apr. 29, 2022, entitled “FILTER ASSEMBLY,”which claims priority to U.S. Provisional Application No. 63/182,175,filed on Apr. 30, 2021, entitled “FILTER ASSEMBLY,” both of which arehereby incorporated herein by reference in their entireties.

FIELD OF THE DISCLOSURE

The present disclosure generally relates to a filter assembly, and morespecifically, to a filter assembly that includes a filter unitconfigured to selectively engage a fluid manifold.

BACKGROUND OF THE DISCLOSURE

Some appliances may dispense water. The water may be filtered.

SUMMARY OF THE DISCLOSURE

According to one aspect of the present disclosure, a filter unitincludes a body portion that receives a water filter. An engagingportion is coupled to the body portion. A bypass actuator rotatesrelative to the engaging portion to rotationally and axially operate abypass valve of a fluid manifold. The bypass actuator drives axialengagement of the engaging portion with a valve assembly of the fluidmanifold. The bypass actuator extends through the body portion and theengaging portion.

According to another aspect of the present disclosure, a filter unitincludes a bypass actuator configured to selectively engage a bypassvalve of a fluid manifold. The bypass actuator is rotationally operableto drive each of a rotational motion of the bypass valve about a bypassrotational axis and an axial motion of the bypass valve along the bypassrotational axis. An engaging portion selectively cooperates with arotational operation of the bypass actuator to axially engage a valveassembly of the fluid manifold in a direction parallel with the bypassrotational axis. The filter unit also includes a body portion. Thebypass actuator is rotationally operable with respect to the bodyportion. The engaging portion is fixed with respect to the body portion.

According to yet another aspect of the present disclosure, a filter unitincludes an actuating assembly configured to selectively engage a fluidmanifold in an engaged state. Fluid is configured to flow through abypass channel of the fluid manifold when the actuating assembly is inthe engaged state. The actuating assembly is configured to house afilter media. A bypass actuator extends through the actuating assemblyand is configured to selectively engage the fluid manifold when in theengaged state. The bypass actuator is rotationally operable relative tothe actuating assembly. Rotation of the bypass actuator in the engagedstate is configured to operate a bypass valve of the fluid manifold andalso axially operate the actuating assembly relative to a valve assemblyof the fluid manifold during operation from the engaged state to aninstalled state. The fluid is configured to flow through the filtermedia when the actuating assembly is in the installed state.

These and other features, advantages, and objects of the presentdisclosure will be further understood and appreciated by those skilledin the art by reference to the following specification, claims, andappended drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings:

FIG. 1A is a side perspective view of a filter assembly having a filterunit and a fluid manifold, according to the present disclosure;

FIG. 1B is a cross-sectional view of the filter assembly of FIG. 1A,taken along the lines IB-IB, according to the present disclosure;

FIG. 2 is a side perspective view of a filter unit, according to thepresent disclosure;

FIG. 3 is an exploded view of a filter unit, according to the presentdisclosure;

FIG. 4 is a cross-sectional view of the filter unit of FIG. 2 , takenalong lines IV-IV;

FIG. 5 is a side perspective view of a bypass actuator separated from afilter unit, according to the present disclosure;

FIG. 6A is a partial cross-sectional view of a knob of the filter unitof FIG. 2 , taken along lines VIA-VIA;

FIG. 6B is a partial cross-sectional view of a knob of the filter unitof FIG. 2 , taken along line VIB-VIB;

FIG. 7 is a partial side perspective view of an engaging portion of afilter unit, according to the present disclosure;

FIG. 8 is a partial side perspective view of an engaging portion of afilter unit, according to the present disclosure;

FIG. 9 is a side perspective view of a fastener of a bypass actuator,according to the present disclosure;

FIG. 10 is a side perspective view of a fastener of a bypass actuator,according to the present disclosure;

FIG. 11A is a side perspective view of a fastener of a bypass actuator,according to the present disclosure;

FIG. 11B is a side perspective view of the fastener of FIG. 11A,according to the present disclosure;

FIG. 11C is a plan view of the fastener of FIG. 11A, according to thepresent disclosure;

FIG. 12A is a bottom perspective view of a fastener of a bypassactuator, according to the present disclosure;

FIG. 12B is a side perspective view of the fastener of FIG. 12A,according to the present disclosure;

FIG. 12C is a plan view of the fastener of FIG. 12A, according to thepresent disclosure;

FIG. 13 is an exploded view of a fluid manifold, according to thepresent disclosure;

FIG. 14 is a side perspective view of a valve assembly within a fluidmanifold with a housing in phantom and with a guide feature removed,according to the present disclosure;

FIG. 15 is a cross-sectional view of the fluid manifold of FIG. 14 ,taken along line XV-XV, according to the present disclosure;

FIG. 16 is a cross-sectional view of the fluid manifold of FIG. 14 ,taken along line XVI-XVI, with a guide feature coupled to a housing ofthe fluid manifold, according to the present disclosure;

FIG. 17 is a side perspective view of a fluid manifold, according to thepresent disclosure;

FIG. 18 is a side perspective view of a fluid manifold, according to thepresent disclosure;

FIG. 19 is a partial perspective view of a filter assembly with a filterunit in an engaged state relative to a fluid manifold, according to thepresent disclosure;

FIG. 20 is a partial perspective view of a filter assembly with a filterunit in an engaged state relative to a fluid manifold with a housing ofthe fluid manifold removed, according to the present disclosure;

FIG. 21 is a cross-sectional view of the filter assembly of FIG. 19 ,taken along lines XXI-XXI, according to the present disclosure;

FIG. 22 is a cross-sectional view of the filter assembly of FIG. 19 ,taken along lines XXII-XXII, according to the present disclosure;

FIG. 23 is a partial side perspective view of a filter assembly with afilter unit in an installed state relative to a fluid manifold,according to the present disclosure;

FIG. 24 is a partial side perspective view of a filter assembly with afilter unit in an installed state relative to a fluid manifold with ahousing of the fluid manifold removed, according to the presentdisclosure;

FIG. 25 is a cross-sectional view of the filter assembly of FIG. 23 ,taken along lines XXV-XXV, according to the present disclosure;

FIG. 26 is a cross-sectional view of the filter assembly of FIG. 23 ,taken along lines XXVI-XXVI, according to the present disclosure;

FIG. 27 is an end perspective view of a bypass valve, according to thepresent disclosure;

FIG. 28 is a side perspective view of a bypass valve, according to thepresent disclosure;

FIG. 29 is another side perspective view of a bypass valve, according tothe present disclosure;

FIG. 30 is another side perspective view of a bypass valve, according tothe present disclosure

FIG. 31 is a partial cross-sectional view of a housing of a fluidmanifold of FIG. 25 , according to the present disclosure;

FIG. 32 is an enlarged view of a protrusion of the fluid manifold ofFIG. 31 , taken at area XXXII, according to the present disclosure;

FIG. 33 is a partial side perspective view of a filter manifold that hasa bypass including a guide feature that slidably engages a protrusion,according to the present disclosure;

FIG. 34 is a cross-sectional perspective view of the bypass valveengaging a bypass actuator of FIG. 33 , taken along lines XXXIV-XXXIV,according to the present disclosure;

FIG. 35 is a schematic view of a bypass valve engaging a protrusion of afluid manifold and a fastener of a bypass actuator engaging a retainingfeature of the fluid manifold, with the bypass valve in a bypassposition, according to the present disclosure;

FIG. 36 is a schematic view of a bypass valve engaging a protrusion of afluid manifold and a fastener of a bypass actuator engaging a retainingfeature of the fluid manifold, with the bypass valve between a bypassposition and a filtering position, according to the present disclosure;

FIG. 37 is a schematic view of a bypass valve engaging a protrusion of afluid manifold and a fastener of a bypass actuator engaging a retainingfeature of the fluid manifold, with the bypass valve between a bypassposition and a filtering position, according to the present disclosure;

FIG. 38 is a schematic view of a bypass valve engaging a protrusion of afluid manifold and a fastener of a bypass actuator engaging a retainingfeature of the fluid manifold, with the bypass valve between a bypassposition and a filtering position, according to the present disclosure;

FIG. 39 is a schematic view of a bypass valve engaging a protrusion of afluid manifold and a fastener of a bypass actuator engaging a retainingfeature of the fluid manifold, with the bypass valve in a filteringposition and the retaining feature within a detent of the fastener,according to the present disclosure;

FIG. 40 is a side perspective view of a bypass valve with slopedchannels, according to the present disclosure;

FIG. 41 is a side perspective view of a bypass valve engaging elongatedprotrusions of a fluid manifold and a fastener of a bypass actuator,with the bypass valve in a bypass position, according to the presentdisclosure;

FIG. 42 is a cross-sectional view of a bypass valve engaging elongatedprotrusions of a fluid manifold and a fastener of a bypass actuator,with the bypass valve in a bypass position, according to the presentdisclosure;

FIG. 43 is a cross-sectional view of a fluid manifold with a filter unitin an engaged state and a bypass valve in a bypass position, accordingto the present disclosure;

FIG. 44 is a cross-sectional view of a fluid manifold with a filter unitin an installed state and a bypass valve in a filtering position,according to the present disclosure;

FIG. 45 is a front perspective view of an appliance having a filterassembly in an exemplary and non-limiting location, according to thepresent disclosure;

FIG. 46 is a side perspective view of a housing configured to receive afilter unit and having a fluid manifold, according to the presentdisclosure;

FIG. 47 is a perspective view of a housing for receiving a filter unit,according to the present disclosure;

FIG. 48 is a side perspective view of a filter unit to be inserted intoa housing to engage a fluid manifold, according to the presentdisclosure;

FIG. 49 is a perspective view of a housing having projections extendingfrom an inner surface thereof to engage a filter unit, according to thepresent disclosure;

FIG. 50 is an exploded side elevational view of a multi-component filterunit, according to the present disclosure;

FIG. 51 is a schematic side elevational view of a bypass actuator havinga helicopter retention feature, according to the present disclosure;

FIG. 52 is a schematic side elevational view of a bypass actuator havinga spring-loaded retention feature, according to the present disclosure;

FIG. 53 is a schematic side elevational view of a bypass actuator with adriving feature, according to the present disclosure;

FIG. 54 is a schematic side elevational view of a bypass actuator havingspring-loaded projections to engage a bypass valve, according to thepresent disclosure;

FIG. 55 is a schematic side elevational view of a filter unit with aremovable portion of a bypass actuator, according to the presentdisclosure;

FIG. 56 is a partial cross-sectional view of a filter unit in a firstengaging position relative to a fluid manifold and illustrating variousdimensions, according to the present disclosure;

FIG. 57 is a partial cross-sectional view of a filter unit in a secondengaging position relative to a fluid manifold and illustrating variousdimensions, according to the present disclosure;

FIG. 58 is a partial cross-sectional view of a filter unit in aninstalled position relative to a fluid manifold, illustrating variousdimensions, according to the present disclosure;

FIG. 59 is a partial top plan of a fluid manifold illustrating variousdimensions, according to the present disclosure;

FIG. 60 is a partial perspective view of a fluid manifold having anactuator port and illustrating a dimension, according to the presentdisclosure;

FIG. 61 is a side elevational view of a fastener for a filter unitbypass actuator, illustrating various dimensions, according to thepresent disclosure;

FIG. 62 is a partial side elevational view of a fastener for a filterunit bypass actuator, illustrating various dimensions of an interlock,according to the present disclosure;

FIG. 63 is a partial cross-sectional view of a fastener of a filter unitengaging a fluid manifold, according to the present disclosure;

FIG. 64 is a flow diagram of a method of installing a filter unit,according to the present disclosure;

FIG. 65 is a flow diagram of a method of filtering water with a filterunit, according to the present disclosure;

FIG. 66 is a side perspective view of a filter unit, according to thepresent disclosure;

FIG. 67 is a side elevational view of a filter unit, according to thepresent disclosure;

FIG. 68 is another side elevational view of a filter unit, according tothe present disclosure;

FIG. 69 is another side elevational view of a filter unit, according tothe present disclosure;

FIG. 70 is another side elevational view of a filter unit, according tothe present disclosure;

FIG. 71 is a first end plan view of a filter unit, according to thepresent disclosure;

FIG. 72A is a second end plan view of a filter unit, according to thepresent disclosure;

FIG. 72B is another second end plan view of a filter unit, according tothe present disclosure;

FIG. 73A is a side perspective view of a filter unit, according to thepresent disclosure; and

FIG. 73B is another side perspective view of a filter unit, according tothe present disclosure.

The components in the figures are not necessarily to scale, emphasisinstead being placed upon illustrating the principles described herein.

DETAILED DESCRIPTION

The present illustrated embodiments reside primarily in combinations ofmethod steps and apparatus components related to a filter assembly.Accordingly, the apparatus components and method steps have beenrepresented, where appropriate, by conventional symbols in the drawings,showing only those specific details that are pertinent to understandingthe embodiments of the present disclosure so as not to obscure thedisclosure with details that will be readily apparent to those ofordinary skill in the art having the benefit of the description herein.Further, like numerals in the description and drawings represent likeelements.

For purposes of description herein, the terms “upper,” “lower,” “right,”“left,” “rear,” “front,” “vertical,” “horizontal,” and derivativesthereof shall relate to the disclosure as oriented in FIGS. 1A and 1B.Unless stated otherwise, the term “front” shall refer to the surface ofthe element closer to an intended viewer, and the term “rear” shallrefer to the surface of the element further from the intended viewer.However, it is to be understood that the disclosure may assume variousalternative orientations, except where expressly specified to thecontrary. It is also to be understood that the specific devices andprocesses illustrated in the attached drawings, and described in thefollowing specification are simply exemplary embodiments of theinventive concepts defined in the appended claims. Hence, specificdimensions and other physical characteristics relating to theembodiments disclosed herein are not to be considered as limiting,unless the claims expressly state otherwise.

The terms “including,” “comprises,” “comprising,” or any other variationthereof, are intended to cover a non-exclusive inclusion, such that aprocess, method, article, or apparatus that comprises a list of elementsdoes not include only those elements but may include other elements notexpressly listed or inherent to such process, method, article, orapparatus. An element preceded by “comprises a . . . ” does not, withoutmore constraints, preclude the existence of additional identicalelements in the process, method, article, or apparatus that comprisesthe element.

Referring to FIGS. 1A-73B, reference numeral 10 generally designates afilter unit that includes a body portion 12, which receives a waterfilter 14. An engaging portion 16 is coupled to the body portion 12. Abypass actuator 18 or bypass actuator assembly 18 rotates relative tothe engaging portion 16 to rotationally operate a bypass valve 20 of amanifold assembly or fluid manifold 22. The bypass actuator 18 alsoaxially operates the bypass valve 20. The bypass actuator 18 drivesaxial engagement of the engaging portion 16 with a valve assembly 24 ofthe fluid manifold 22. The bypass actuator 18 extends through the bodyportion 12, the water filter 14, and the engaging portion 16.

Referring to FIGS. 1A and 1B, a filter assembly 30 includes the filterunit 10 and the fluid manifold 22. The filter unit 10 selectivelyengages the fluid manifold 22 for filtering water. The fluid manifold 22may be coupled to, or otherwise associated with, an appliance 40 (FIG.46 ). The appliance 40 may be any household or commercial appliance 40that utilizes filtered water, such as, for example, a refrigerator orrefrigerated appliance 40.

The fluid manifold 22 includes a manifold inlet 32 and a manifold outlet34. The manifold inlet 32 is configured to engage tubing 36 that extendsbetween a water source or water supply and the fluid manifold 22. Themanifold outlet 34 is configured to engage tubing 38 that extendsbetween the fluid manifold 22 and a subsequent water location forproviding or storing the filtered water, such as a dispenser, acontainer, or an ice maker. The manifold inlet 32 and the manifoldoutlet 34 are generally disposed on a same side of the fluid manifold22. Accordingly, the manifold inlet 32 and the manifold outlet 34 arepositioned on the side of the fluid manifold 22 opposite the filter unit10.

Referring to FIG. 2 , the filter unit 10 includes an actuating assembly50 that includes the body portion 12 and the engaging portion 16, whichoperates to actuate the valve assembly 24 (FIG. 13 ) of the fluidmanifold 22. The body portion 12 extends along a longitudinal axis 52(FIGS. 1A and 1B) of the filter unit 10. The body portion 12 isgenerally an elongated shape, such as a cylinder, a teardrop, or othergenerally elongated-prism shapes, but any shape is within the scope ofthis disclosure. In aspects of the device having an extruded teardropshape, the filter unit 10 generally includes a locating featureconfigured as a lobe 54, which provides a shape that facilitatesalignment with the fluid manifold 22. The lobe 54 assists a user inproperly aligning the filter unit 10 with the fluid manifold 22 throughthe use of a guide member 56 (FIG. 13 ), discussed further herein. Thelobe 54 extends along the length of the body portion 12. Typically, thelobe 54 extends from a first end 58 of the body portion 12 to a secondend 60 of the body portion 12. The lobe 54 has a generally parabolic orbell shape, which contributes to the teardrop shape of the filter unit10.

The lobe 54 may have or define one or more features. In the illustratedexample, the lobe 54 includes or defines grooves 62 extending betweenthe first end 58 and the second end 60. The grooves 62 are arranged in aparallel configuration. Generally, there are three grooves 62 arrangedon each side of the lobe 54. In certain aspects, the lobe 54 may haveribs that protrude at least slightly from a surface of the lobe 54. Itis contemplated that the features on the lobe 54, such as the grooves 62or ribs, may be configured as a series of elongated features that arealigned with one another without departing from the teachings herein.

The lobe 54 is an exemplary locating feature utilized on the filter unit10. The filter unit 10 may include any practicable configuration of alocating feature, generally on the body portion 12. The locating featuremay be defined by, coupled to, or otherwise attached to the filter unit10. The locating feature may extend an entire length of the body portion12 or a portion of the length. The locating feature may be defined inthe body portion 12, on the body portion 12, flush with the body portion12, or extend from the body portion 12. The locating feature assists theuser in properly aligning the filter unit 10 with the fluid manifold 22.

Referring still to FIG. 2 , as well as FIGS. 3 and 4 , the first end 58of the body portion 12 defines a recessed region 70 surrounded by anouter wall 72. The recessed region 70 partially encloses an interior 74of the body portion 12. The second end 60 of the body portion 12 isopen, which allows the water filter 14 to be inserted into the interior74 of the body portion 12.

The second end 60 of the body portion 12 is coupled to the engagingportion 16. The engaging portion 16 generally refers to the portion ofthe actuating assembly 50 that more directly engages the valve assembly24 of the fluid manifold 22. The engaging portion 16 may also beconsidered a fluid receiving and/or delivery portion or end of thefilter unit 10. The engaging portion 16 partially encloses the interior74 of the body portion 12 to retain the water filter 14 within theactuating assembly 50.

The engaging portion 16 is fixed relative to the body portion 12. Theengaging portion 16 is a fluid directing end configured to selectivelyengage a water source, such as the fluid manifold 22 (FIGS. 1A and 1B),to filter water through the filter unit 10. The engaging portion 16includes a first extension or projection 80 that defines a filter inlet82 and a second extension or projection 84 that defines a filter outlet86. Accordingly, the fluid directing end of the filter unit 10 isconfigured to direct water into the filter unit 10 from the water sourceand subsequently out of the filter unit 10 after the water is filtered.The filter inlet 82 and the filter outlet 86 are generally offset fromdistal ends 88, 90 of the first and second projections 80, 84,respectively. Water flows, passes, or travels through the filter inlet82, through an interior 92 of the first projection 80, and into thewater filter 14. Once filtered, the water flows, passes, or travelsthrough an interior 94 of the second projection 84 and through thefilter outlet 86.

The filter unit 10 may include an end cap 96, which may be selectivelycoupled to the filter unit 10 and be disposed about the projections 80,84. The end cap 96 may be advantageous during manufacturing, shipping,storage, etc. The end cap 96 is coupled to the body portion 12 adjacentto the engaging portion 16 of the filter unit 10. The end cap 96 isconfigured to conceal and protect the projections 80, 84 and a portionof the bypass actuator 18. The end cap 96 is configured to be removedprior to engagement of the filter unit 10 with the fluid manifold 22.

As illustrated in FIG. 4 , the end cap 96 defines two receivingprotrusions 98. The receiving protrusions 98 define inner channelsconfigured to receive the first and second projections 80, 84 of thefilter unit 10. The bypass actuator 18 extends between the two receivingprotrusions 98. The receiving protrusions 98 assist with protecting theprojections 80, 84, as well as maintaining the engaging portion 16within a select position within the end cap 96. The receivingprotrusions 98 may also assisting securing the end cap 96 to the filterunit 10.

Referring still to FIGS. 2-4 , the body portion 12 receives the waterfilter 14. The water filter 14 may include any form of filter media forfiltering water traveling or flowing through the filter unit 10. Thewater filter 14 is disposed between a first retainer 100 and a secondretainer 102. The first retainer 100 is disposed proximate to the firstend 58 of the body portion 12, and the second retainer 102 is disposedproximate to the second end 60 of the body portion 12. Each of the firstretainer 100 and the second retainer 102 define a recess 104 between aninner rim 106 and an outer rim 120 for receiving and holding the waterfilter 14. The water filter 14 defines a hollow interior 122.Accordingly, the water filter 14 generally have an “O” cross-sectionalshape. The inner rims 106 extend into the hollow interior 122 to engagean inner surface 124 of the water filter 14. The outer rim 120 extendsalong an outer surface 126 of the water filter 14. The first and secondretainers 100, 102 operate to secure the water filter 14 in a selectedposition within the interior 74 of the body portion 12 as water flowsthrough the water filter 14.

The second retainer 102 includes a lip 140 that extends in an opposingdirection relative to the inner and outer rims 106, 120 of the secondretainer 102. The engaging portion 16 includes a rim 142 that abuts thelip 140 of the second retainer 102. A sealing member, generallyconfigured as an O-ring 144, is disposed between the lip 140 of thesecond retainer 102 and the rim 142 of the engaging portion 16 to form aseal.

Referring still to FIGS. 2-4 , the inner rims 106 of the first andsecond retainers 100, 102 engage a sleeve 156 that extends through thehollow interior 122 of the water filter 14. The sleeve 156 isillustrated as part of the engaging portion 16. Generally, the engagingportion 16, including the sleeve 156, can be formed through an injectionmolding process. It is also contemplated that the sleeve 156 may be aseparate component coupled to the engaging portion 16. The inner rim 106of the first retainer 100 extends both into the hollow interior 122 ofthe water filter 14 and away from the water filter 14, increasing anengagement area between the first retainer 100 and the sleeve 156. Asealing member or O-ring 158 is disposed between the inner rim 106 ofthe first retainer 100 and the sleeve 156 to define a seal that enclosesthe hollow interior 122. The sleeve 156 generally extends between thefirst end 58 and the second end 60 of the body portion 12. Additionally,the sleeve 156 extends through the hollow interior 122 of the waterfilter 14.

Additionally or alternatively, the sleeve 156 extends through therecessed region 70 of the first end 58 of the body portion 12 to engagea support plate 160. An end 162 of the sleeve 156 has a width less thana width of the remainder of the sleeve 156 to form an interference fitwith the support plate 160. The support plate 160 engages a surface 164of the recessed region 70.

The filter unit 10 includes the bypass actuator 18 for driving movementof the bypass valve 20 in the fluid manifold 22. The bypass actuator 18is independently rotatable with respect to the actuating assembly 50.Typically, the bypass actuator 18 is also axially fixed relative to theactuating assembly 50. The bypass actuator 18 includes a fastener 170disposed proximate to the engaging portion 16. The bypass actuator 18may also include a latch, fastener, coupling feature, etc. disposedproximate to the engaging portion 16. The bypass actuator 18 includesopposing retention features 180, 182 (e.g., opposing retentionstructures) for securing the bypass actuator 18 to the actuatingassembly 50.

Referring still to FIG. 4 , as well as FIGS. 5-6B, the first retentionfeature 180 is configured as a cover 184 coupled to a central surface186 (FIG. 7 ) of the engaging portion 16. The cover 184 is disposedbetween the first projection 80 and the second projection 84. The cover184 axially fixes the fastener 170 with respect to the engaging portion16. A radial flange 188 extends from a proximal end 190 of the fastener170 and is housed by the cover 184. The cover 184 allows the fastener170 to rotate and prevents axial movement of the fastener 170 relativeto the engaging portion 16 (e.g., maintains an axial position of thefastener 170 relative to the engaging portion 16).

The second retention feature 182 is configured as a knob 204 disposedproximate to the first end 58 of the body portion 12. While the cover184 and the radial flange 188 hold the bypass actuator 18 relative tothe body portion 12, the knob 204 also retains the bypass actuator 18relative to the body portion 12 and minimizes decoupling or de-aligningof the bypass actuator 18 from an axial alignment within the bodyportion 12. The cover 184 and the knob 204 secure the bypass actuator 18at each end 58, 60 of the body portion 12. The cover 184 and the knob204 limit axial movement of the bypass actuator 18 relative to the bodyportion 12. Accordingly, in various aspects, the filter unit 10 includesmultiple securing mechanisms that cooperate to contemporaneously allowrotational movement and prevent axial movement of the bypass actuator 18relative to the actuating assembly 50. Moreover, the knob 204 may be anoperating end of the bypass actuator 18. The operating end may causerotation of the fastener 170. It is contemplated that at least a portionof the motion can be a linear force applied by the user to causerotational motion of the fastener 170.

The knob 204 is disposed partially within a space defined by therecessed region 70 and the outer wall 72. The knob 204 includes snapfeatures 206 that engage a radial extension 208 of the support plate160. The snap features 206 retain the engagement between the knob 204and the support plate 160, while slidably engaging the radial extension208. Accordingly, the knob 204 rotates relative to the support plate160.

Referring still to FIGS. 6A and 6B, the knob 204 defines internalprojections 210 that engage stop projections 212 of the support plate160. The stop projections 212 extend vertically from the support plate160, away from the surface 164 of the recessed region 70. The stopprojections 212 abut the internal projections 210 of the knob 204 toallow rotation in a first rotational direction 214 and a secondrotational direction 216 through a certain rotational range. Theabutting engagement between the internal projections 210 and the stopprojections 212 limits or prevents rotation of the knob 204 relative tothe support plate 160 outside of this rotational range. Accordingly, thesupport plate 160 defines the rotational range of the knob 204 relativeto the actuating assembly 50. The opposing retention features 180, 182secure the bypass actuator 18 to the actuating assembly 50. There may bemore or fewer stop projections 212, which may increase or decrease therotational range of the knob 204 without departing from the teachingsherein.

The knob 204 may include an indicator 218 to guide the user to rotatethe knob 204 in the first and second rotational directions 214, 216,respectively. In the illustrated example, the indicator 218 is indentedinto the knob 204. In such examples, the indicator 218 may be includedin the knob 204 during a molding process. It is also contemplated thatthe indicator 218 may be painted on the knob 204, may be a protrusionextending from the knob 204, or otherwise included in the filter unit10.

The knob 204 is operably coupled to the fastener 170 via a shaft 228.The shaft 228 extends through the sleeve 156 and, consequently, throughthe interior 74 that houses the water filter 14. The sleeve 156 providesspace for the rotation of the shaft 228 without substantial interferencefrom water flowing through the filter unit 10 and/or from the waterfilter 14. The knob 204 defines an inner channel 230 for receiving afirst end 232 of the shaft 228. The inner channel 230 typically definesa “D”-shape to receive the first end 232 of the shaft 228, which definesa mating shape. The “D”-shape of the inner channel 230 and the first end232 of the shaft 228 provides an interference fit, such that the shaft228 is rotated in response to rotation of the knob 204 by the user. Itis contemplated that the “D”-shape may be loosely fit within the innerchannel 230 and abut surfaces or features within the inner channel 230to rotate the shaft 228 with the knob 204. While the “D” shape isindicated, other shapes or features can be used to rotationally securethe inner channel 230 to the shaft 228.

With further reference to FIGS. 6A and 6B, the second end 234 of theshaft 228 is coupled to the fastener 170. The proximal end 190 of thefastener 170 defines a channel 236 for receiving the second end 234 ofthe shaft 228. The second end 234 of the shaft 228 defines a texturedregion 238 for providing a frictional or interference fit with thefastener 170. The textured region 238 may include ridges, projections,threads, irregularities, or other features that engage an inner surfaceof the fastener 170. When the user rotates the knob 204, the fastener170 is also rotated. It should be understood that the “D” shape of theinner channel 230 and the textured region 238 of the shaft 228 areexemplary securing mechanisms. It should also be understood that otherfastening mechanisms and methods can be utilized for securing the shaft228 at each of the first and second ends 232, 234.

Referring to FIGS. 7 and 8 , the fastener 170 of the bypass actuator 18is disposed proximate to the engaging portion 16, with the radial flange188 disposed between the cover 184 and the engaging portion 16. Thecover 184 includes sections of sloped surfaces 240. The sloped surfaces240 engage a tool or machine that spin welds or otherwise welds,adheres, or couples the cover 184 to the engaging portion 16.

The fastener 170 may be an actuating end of the bypass actuator 18. Thefastener 170 is disposed between the first projection 80, which definesthe filter inlet 82, and the second projection 84, which defines thefilter outlet 86. The first projection 80, the second projection 84, andthe fastener 170 define a collinear arrangement. Stated differently, thebody portion 12 includes a symmetrical reference plane that intersectswith the first projection 80, the second projection 84, and the bypassactuator 18. Generally, the fastener 170 is disposed a substantiallysame distance from each of the first projection 80 and the secondprojection 84.

Additionally or alternatively, each of the first projection 80, thesecond projection 84, and the fastener 170 extend in a same directionfor a substantially similar distance from the central surface 186 of theengaging portion 16. In certain aspects, each of the first projection80, the second projection 84, and the fastener 170 extend in a range offrom about 0.5 cm to about 2 cm from the central surface 186 of theengaging portion 16. The substantially similar length of the firstprojection 80, the second projection 84, and the fastener 170 allows foreach of an inlet valve 242, an outlet valve 244, and the bypass valve 20of the valve assembly 24 to be actuated concurrently (FIG. 13 ) or in apredetermined actuation sequence.

Referring to FIGS. 7-13 , the fastener 170 includes the proximal end 190coupled to the shaft 228 (FIG. 4 ) and a distal end 250 configured toengage the bypass valve 20. The radial flange 188 extends from theproximal end 190 and has a width greater than a width of a remainder ofthe fastener 170. The fastener 170 defines an interface 252 forselectively engaging at least one retaining feature 256, 258 of thefluid manifold 22. As illustrated in FIGS. 10 and 11A, the interface 252includes two ramps or sloped grooves 260, 262 allowing the fastener 170to engage two retaining features 256, 258 concurrently. The interface252 has two openings 264 at the distal end 250 of fastener 170 forreceiving the retaining features 256, 258 and engaging the retainingfeatures 256, 258 with the sloped grooves 260, 262, respectively.

Each sloped groove 260, 262 extends from the distal end 250 and towardthe proximal end 190 of the fastener 170. The sloped grooves 260, 262guide axial and rotational movement of the fastener 170, and, in turn,guide axial movement of the filter unit 10 relative to the fluidmanifold 22. The interface 252 may be configured as at least one slope,ramp, channel, receptacle, groove, step, or other guide features thatallow for axial and rotational movement of the fastener 170.

The interface 252 includes at least one helical section 266. In theillustrated example, the sloped grooves 260, 262 spiral or extend in thesame direction (e.g., counter clockwise) along the fastener 170 towardthe proximal end 190 to define the helical shape or section 266. Byextending in the same direction, the sloped grooves 260, 262 do notinterfere with one another and generally define a double helix. Eachsloped groove 260, 262 may have a generally consistent pitch or slopebetween the distal end 250 and the proximal end 190 of the fastener 170.The slope may be about 45° along the entire sloped grooves 260, 262,respectively. It is also contemplated that the slope may differ at theopenings 264 and detents 268 while remaining generally constanttherebetween.

Alternatively, in certain aspects, the pitch or slope may be variablebetween the distal end 250 and the proximal end 190. The pitch proximateto the distal end 250 may be shallower, providing a greater proportionaldegree of rotational movement than axial movement to provide a greatermechanical advantage in the axial direction to ensure an initialengagement with the fluid manifold 22. In such aspects, due to theshallower pitch proximate to the openings 264, a rotation ofapproximately 5° may cause engagement between the fastener 170 and theretaining features 256, 258. The pitch may then become steeper, toincrease the axial movement. In certain aspects, the steeper pitch maybe about 45°.

Referring still to FIGS. 7-13 , the openings 264 may be a receivingsection of the sloped grooves 260, 262 for receiving the retainingfeatures 256, 258. The openings 264 may intersect the reference plane atan engaging portion of the reference plane. As the fastener 170 isrotated, the bypass actuator 18 translates the sloped grooves 260, 262through the reference plane from the engaging portion of the referenceplane to an installed portion of the reference plane. Stateddifferently, different portions of the sloped grooves 260, 262 intersectthe reference plane as the fastener 170 is rotated. An axial distancefrom the engaging portion to the installed portion of the referenceplane represents an insertion depth of the filter inlet 82 and thefilter outlet 86 relative to the fluid manifold 22 (e.g., the watersource).

With further reference to FIGS. 9-13 , the interface 252 includes thedetent 268 for engaging each retaining feature 256, 258 proximate to theproximal end 190 of the fastener 170. The detents 268 are configured toretain the fastener 170 in the selected position relative to the fluidmanifold 22 by selectively securing the retaining features 256, 258.Each sloped groove 260, 262 extends approximately 180° around thefastener 170. Accordingly, the opening 264 to the first sloped groove260 is generally vertically aligned with the detent 268 of the secondsloped groove 262, and the opening 264 to the second sloped groove 262is generally vertically aligned with the detent 268 of the first slopedgroove 260. Based on the selected rotation of the fastener 170, eachsloped groove 260, 262 may extend a different length along the fastener170 to provide the selected rotation.

As illustrated in FIGS. 11C and 12C, the distal end 250 of the fastener170 defines an interlock 280 configured to abut the bypass valve 20 in amating engagement. The interlock 280 and the channel 236 that receivesthe shaft 228 (FIG. 4 ) are vertically aligned and disposed along arotational axis 282 of the fastener 170. The interlock 280 being definedon the rotational axis 282 provides for a more balanced rotation of thefastener 170 to drive, or at least foster or initiate, rotationalmovement of the bypass valve 20 as it moves axially. The rotational axis282 of the fastener 170 is included in the reference plane that extendsthrough the inlet projection 80, the outlet projection 84, and thefastener 170.

The interlock 280 is configured to matingly engage or otherwisecooperate with an end 284 of the bypass valve 20. In the illustratedconfiguration, the interlock 280 is a recess having a lemniscate, “FIG.8 ,” or hourglass shape. It is contemplated that other shapes may alsobe employed without departing from the teachings herein. The interlock280 may have a depth in a range of about 0.25 mm to about 5 mm toreceive the end 284 of the bypass valve 20. The size, including depth,may vary based on the overall configuration of the filter assembly 30and/or the interaction between the fastener 170 and the bypass valve 20.The shape of the interlock 280 allows the fastener 170 to receive thebypass valve 20 and remain engaged with the bypass valve 20 as each ofthe fastener 170 and the bypass valve 20 are moved. The interlock 280may also be projections, protrusions, grooves, or other features thatmatingly engage with the bypass valve 20. The interlock 280 may includea shape having at least one axis of symmetry where the fastener 170 canengage the bypass valve 20 in more than one rotational orientation.

Referring to FIGS. 11A-11C, in various aspects, the distal end 250 ofthe fastener 170 defines a substantially symmetrical “bowtie” shape. The“bowtie” shape is formed with a central portion defining the interlock280, and the openings 264 defined on opposing sides of the centralportion. The sloped grooves 260, 262 extend from the openings 264 at oneend of the “bowtie” shape to adjacent to the opposing end of the“bowtie” shape as the sloped grooves 260, 262 extend toward the proximalend 190.

Referring to FIGS. 12A-12C, the distal end 250 of the fastener 170 maydefine different shapes based on the movement of the retaining features256, 258 along the sloped grooves 260, 262. While the distal end 250 inthe example configuration illustrated in FIGS. 11A-11C defines the“bowtie” shape, the exemplary configuration illustrated in FIGS. 12A-12Chas more of a “pinwheel” shape. The distal end 250 includes the centralportion with the interlock 280, and two sides extending in opposingdirections from the central portion. Each side is defined by theopenings 264 and the sloped grooves 260, 262. The sides are angledtoward the respective opening 264, with one edge of the “bowtie” on eachside removed to form the angled “pinwheel” shape. This providesadditional space for the retaining features 256, 258 moving along thesloped grooves 260, 262. In this configuration, the distal end 250provides larger openings 264 into the sloped grooves 260, 262 and mayhave less interference with the movement of the retaining features 256,258 through the openings 264 and along the sloped grooves 260, 262.Further, this configuration may provide for more tolerance for receivingand engaging the retaining features 256, 258.

Referring now to FIGS. 13-16 , the fluid manifold 22 includes a base300, a housing 302, and the guide member 56. The base 300 is configuredto engage the tubing 36, 38, which fluidly couples the filter assembly30 to the water supply source and subsequent water location (e.g., thedispenser, the container, the ice maker, etc.). The base 300 definesvalve seats 304, 306, 308 for partially retaining the valve assembly 24.The valve assembly 24 generally includes the inlet valve 242, the outletvalve 244, and the bypass valve 20. The bypass valve 20 is disposed inthe central valve seat 308 and the inlet valve 242 and the outlet valve244 are disposed in the outer valve seats 304, 306, respectively. Thevalve seats 304, 306, 308 generally define a collinear arrangement,which corresponds with the collinear arrangement of the fastener 170 andthe projections 80, 84 on the filter unit 10. The base 300 defines ribsthat extend into a space defined by the outer valve seats 304, 306 toguide movement of the inlet and outlet valves 242, 244.

The housing 302 is coupled to the base 300 and cooperates with the base300 to house the valve assembly 24. The housing 302 snap engages withthe base 300. The housing 302 includes flanges 312 that each defines atleast one aperture 314, and the base 300 includes projections 316 thatsnap-engage with the flanges 312. The projections 316 are disposed atleast partially within corresponding apertures 314 to retain the housing302 to the base 300. The housing 302 defines valve recesses or cavities318, 320, 322 that align with the valve seats 304, 306, 308 to house thevalve assembly 24. A sealing member or O-ring 324 extends around eachvalve seat 304, 306, 308 of the base 300. The O-rings 324 engage thehousing 302 to seal the valve cavities 318, 320, 322.

The inlet valve cavity 318 is in fluid communication with an inlet port340 that is configured to receive the first projection 80 of the filterunit 10 (FIG. 2 ). The outlet valve cavity 320 is in fluid communicationwith an outlet port 342 configured to receive the second projection 84of the filter unit 10 (FIG. 2 ). The inlet and outlet valve cavities318, 320 are narrowed proximate to the inlet port 340 and the outletport 342, respectively, by stop features 344 extending radially into theinlet and outlet valve cavities 318, 320. The inlet and outlet valves242, 244 each include a tip 346 that extends beyond the stop features344 and into the respective inlet and outlet port 340, 342. Shoulders348 of each of the inlet and outlet valves 242, 244 are configured toabut the stop features 344 when the inlet and outlet valves 242, 244 arein closed positions 350. The stop features 344 retain the inlet andoutlet valves 242, 244 primarily in the inlet and outlet valve cavities318, 320.

A first biasing member 370 extends between the base 300 and the inletvalve 242, and a second biasing member 372 extends between the base 300and the outlet valve 244. The first and second biasing members 370, 372bias the inlet and outlet valves 242, 244 toward the stop features 344.When the inlet and outlet valves 242, 244 abut the stop features 344 andthe bypass valve 20 is in a bypass position 374, water flows through themanifold inlet 32, through a bypass channel 376, and through themanifold outlet 34 without entering the filter unit 10. The biasingmembers 370, 372 are illustrated as coil springs, but may be springs,coil springs, magnets, or other biasing features without departing fromthe teachings herein.

Referring still to FIGS. 13-16 , each of the shoulders 348 for inletvalve 242 and the outlet valve 244 includes a sealing member or O-ring378 extending around the shoulders 348. When the inlet and outlet valves242, 244 are biased toward the stop features 344, the O-rings 378 abutthe stop features 344 and provide a seal that prevents the water fromflowing to the inlet and outlet ports 340, 342.

The valve assembly 24 also includes the bypass valve 20 positioned orlocated within the bypass valve cavity 322 of the fluid manifold 22. Thebypass valve cavity 322 is in fluid communication with an actuator port388 for receiving the fastener 170. The bypass valve 20 includes a stem390, which includes the end 284 that extends into the actuator port 388.The housing 302 includes a stop feature 392 that extends into the bypassvalve cavity 322. The bypass valve 20 includes projections 394 that abutthe stop feature 392 and retain the bypass valve 20 primarily within thebypass valve cavity 322 while allowing the stem 390 to extend into theactuator port 388.

A third biasing member 396 extends between the base 300 and bypass valve20. The third biasing member 396 biases the bypass valve 20 toward thestop feature 392 and toward the bypass position 374. The bypass valve 20includes two sealing members or O-rings 398, 400. When in the bypassposition 374, each O-ring 398 abuts an inner surface 402 of the housing302 within the bypass valve cavity 322. The O-rings 398, 400substantially prevent water flowing through the bypass channel 376 fromtraveling out of the bypass channel 376 and toward the actuator port388. The biasing member 396 is illustrated as a coil spring, but may bea spring, a coil spring, magnets, or other biasing features withoutdeparting from the teachings herein.

Referring still to FIGS. 15 and 16 , as well as FIGS. 17 and 18 , aspreviously stated, the fluid manifold 22 includes the guide member 56.The guide member 56 is coupled to the housing 302 and guides engagementof the filter unit 10 with the fluid manifold 22. The guide member 56defines a shape that mates with the shape of the filter unit 10 (e.g.,the teardrop shape). A receiving surface 414 of the guide member 56defines a guide opening 416 that assists in aligning the engagingportion 16 with the valve assembly 24 of the fluid manifold 22. Theguide opening 416 extends around the inlet port 340, the outlet port342, and the actuator port 388, providing a more precise location forinserting the filter unit 10. The guide member 56 includes snap members418 that snap-engage with tabs 420 extending in a generallyperpendicular direction from the housing 302.

The fluid manifold 22 includes the retaining features 256, 258 extendingor projecting into the actuator port 388. Generally, there are tworetaining features 256, 258 extending from the fluid manifold 22 andtoward one another. The guide member 56 provides additional supportproximate to each retention feature with support members 422 that engagethe housing 302 proximate to the retaining features 256, 258. The guidemember 56 is generally modular and is configured to be customizable,such that the guide member 56 may be utilized in appliances 40 (such asthe non-limiting example shown in FIG. 52 ) having a variety of filterlocations. When the bypass valve 20 is in the bypass position 374, theend 284 of the bypass valve 20 is disposed proximate to the retainingfeatures 256, 258. This configuration allows for the fastener 170 toengage the bypass valve 20 and the retaining features 256, 258 generallyconcurrently.

Referring to FIGS. 19-22 , during installation and removal of the filterunit 10 relative to the fluid manifold 22, the actuating assembly 50 ismoved along the longitudinal axis 52 relative to the fluid manifold 22.During installation of the filter unit 10, the engaging portion 16operates to activate each of the inlet valve 242 and the outlet valve244. The first projection 80 and the second projection 84 selectivelyengage and activate the valve assembly 24 of the fluid manifold 22.Generally, the first projection 80 and the second projection 84 extend asimilar distance from the central surface 186 of the engaging portion 16to concurrently engage the inlet valve 242 and the outlet valve 244.However, the first and second projections 80, 84 may extend differentlengths to sequentially activate the valve assembly 24. In certainaspects of the device, the engaging portion 16 may include only thefirst projection 80 for operating the inlet valve 242. In such an aspectof the device, fluid pressure can be utilized for operating the outletvalve 244. Additionally, in such an aspect, the first projection 80 mayprevent rotational movement of the engaging portion 16 relative to thehousing 302 of the fluid manifold 22.

When the filter unit 10 is moved to an engaged state 450, the firstprojection 80, which defines the filter inlet 82, is disposed within theinlet port 340, and the second projection 84, which defines the filteroutlet 86, is disposed in the outlet port 342. Each of the firstprojection 80 and the second projection 84 include a seal, exemplifiedas an O-ring 452, disposed proximate the distal end 88, 90 for sealingwithin the fluid manifold 22. The O-rings 452 each cooperate with thehousing 302 of the fluid manifold 22 to form a seal between the filterunit 10 and the inlet and outlet ports 340, 342 of the fluid manifold22. The fastener 170 is disposed within the actuator port 388 andengages the bypass valve 20. The end 284 of the bypass valve 20 mateswith the interlock 280 of the fastener 170. The end 284 of the bypassvalve 20 defines a size and shape to fit within the interlock 280 in amating or interference fit to retain the connection between the fastener170 and the bypass valve 20.

In the engaged state 450, the fastener 170 is engaged with the bypassvalve 20, and the bypass valve 20 remains in the bypass position 374.Additionally, the first projection 80 and the second projection 84 maynot be engaged with the inlet valve 242 and the outlet valve 244,respectively. Alternatively, the first projection 80 and the secondprojection 84 may engage the inlet and outlet valves 242, 244, while theinlet and outlet valves 242, 244 remain in the closed positions 350,abutting the stop features 344. Accordingly, when the filter unit 10 isin the engaged state 450, the water flows through the bypass channel 376and not the filter unit 10.

As the fastener 170 engages the end 284 of the bypass valve 20, thefastener 170 also engages the retaining features 256, 258. The fastener170 is moved until the retaining features 256, 258 are disposed at theopening 264 of the corresponding sloped groove 260, 262, as illustratedin FIGS. 19 and 20 . When the retaining features 256, 258 are engagedwith the interface 252 of the fastener 170, the filter unit 10 may bemoved to an installed state 454.

Referring to FIGS. 23-26 , as the fastener 170 is rotated, the filterunit 10 is moved from the engaged state 450 toward the installed state454. The fastener 170 rotates independently of the engaging portion 16,the body portion 12, and the housing 302 of the fluid manifold 22. Therotation of the fastener 170 draws the filter unit 10 toward the base300 of the fluid manifold 22. In other words, the rotation of thefastener 170 axially adjusts the engaging portion 16 toward the valveassembly 24. The retaining features 256, 258 are illustrated as pins butmay be any practicable feature for engaging the fastener 170.Alternatively, the fastener 170 may have other structures and formationsthat cooperate with various retainers, such as the retaining features256, 258. The engagement between the retaining features 256, 258 and thefastener 170 limits or prevents axial movement of the filter unit 10away from the fluid manifold 22 when the filter unit 10 is in theinstalled state 454.

As the fastener 170 is rotated, the engaging portion 16 selectivelycooperates with the rotational operation of the bypass actuator 18 toaxially engage the valve assembly 24. The first projection 80 and thesecond projection 84 are brought closer to and eventually into contactwith the inlet valve 242 and the outlet valve 244, respectively. Thedistal end 88, 90 of each of the first and second projections 80, 84defines a recess 464 for receiving the tip 346 of the inlet and outletvalves 242, 244, respectively. The recesses 464 retain the engagementwith the tips 346 as the engaging portion 16, the inlet valve 242, andthe outlet valve 244 are axially moved. This helps to prevent eccentricmotion of the inlet and outlet valves 242, 244 when separated from thestop features 344.

The engaging portion 16 is adjusted axially and remains axially alignedwith the base 300 of the fluid manifold 22 as the fastener 170 isrotated. At least one of the first and second projections 80, 84prevents rotational movement of the engaging portion 16 relative to thehousing 302 of the fluid manifold 22. The first and second projections80, 84 overcome the biasing forces of the first and second biasingmembers 370, 372 to adjust the inlet and outlet valves 242, 244 toopened positions 466, allowing water to travel into the filter inlet 82,through the filter unit 10, and then out the filter outlet 86.

The rotation of the fastener 170 allows the sloped grooves 260, 262 tobe operated relative to the retaining features 256, 258. The engagementbetween the fastener 170 and the retaining features 256, 258 operates toaxially draw the filter unit 10 toward the base 300 of the fluidmanifold 22. The pitch of the sloped grooves 260, 262 allows for precisemovement of the filter unit 10 into the installed state 454, as well asa precise insertion depth of the filter unit 10. In addition, themechanical advantage afforded by the sloped grooves 260, 262 providesfor a tighter seal between the filter unit 10 and the fluid manifold 22.

When in the installed state 454, the retaining features 256, 258 aredisposed within the detents 268. The detents 268 operate to hold theretaining features 256, 258 in a selected position of the interface 252to secure the filter unit 10 in the installed state 454. These featuresare configured to secure the body portion 12 to the fluid manifold 22 tolimit movement away from the fluid manifold 22 along the longitudinalaxis 52 when the filter unit 10 is in the installed state 454. Thesefeatures can operate to prevent over-insertion of the filter unit 10 andover-rotation of the fastener 170, which could lead to damage to thefluid manifold 22. It is contemplated that in certain aspects the knob204 (FIGS. 1A-5 and 48 ) may bear most or all of the forces of stoppingrotational travel of the bypass actuator 18.

Referring still to FIGS. 26 , as well as FIGS. 27-30 , rotational andaxial movement of the fastener 170 drives rotational and axial movementof the bypass valve 20 within the bypass valve cavity 322 between thebypass position 374 and a filtering position 480. The fastener 170overcomes the biasing force of the third biasing member 396 to adjustthe bypass valve 20 to the filtering position 480. In the filteringposition 480, due to the axial adjustment of the bypass valve 20, thebypass valve 20 blocks the bypass channel 376, forcing water through thefilter unit 10. The first O-ring 398 remains engaged with the innersurface 402 of the housing 302, providing a seal within the bypass valvecavity 322. Due to the axial adjustment of the bypass valve 20, thesecond O-ring 400 abuts an inner surface 482 of the base 300, providinga further seal within the bypass valve cavity 322.

The fastener 170 moves the bypass valve 20 relative to a bypassrotational axis 484. The fastener 170 rotates the bypass valve 20 aboutthe bypass rotational axis 484 and, concurrently, moves the bypass valve20 along the bypass rotational axis 484. It is also contemplated thatthe fastener 170 may drive the rotational and axial movement of thebypass valve 20 independently. Accordingly, the fastener 170 drives bothrotation of the bypass valve 20 and also axial movement of the bypassvalve 20 in a simultaneous motion, a concurrent motion, a sequentialmotion, or a combination thereof. Moreover, it is contemplated thataxial movement of the fastener 170 may impart axial and rotationalmotion to the bypass valve 20.

As illustrated in FIGS. 27-30 , the end 284 of the bypass valve 20defines a mating feature 488 for being selectively received by theinterlock 280 of the fastener 170. In the illustrated example, themating feature 488 defines a lemniscate, “FIG. 8 ,” or hourglass shapethat is selectively disposed within the interlock 280. The size andshape of the mating feature 488 provide the interference fit between thebypass valve 20 and the fastener 170.

The bypass valve 20 includes a ledge 490 positioned proximate to thefirst O-ring 398. Adjacent to the ledge 490 are two guide features 492,494. The guide features 492, 494 generally slope from the ledge 490toward the projections 394. The guide features 492, 494 spiral or extendin a similar orientation and direction (e.g., counter clockwise) aroundthe bypass valve 20, such that the first guide feature 492 does notinterfere with the second guide feature 494. The guide features 492, 494are substantially similar and disposed on opposing sides of the bypassvalve 20.

Each guide feature 492, 494 has a sloped surface 496 that extends from abypass location 498 to a filtering location 500. The filtering location500 is disposed vertically above the bypass location 498 (e.g., towardthe end 284 of the bypass valve 20) and on an opposing side of thebypass valve 20 relative to the filtering location 500. Each guidefeature 492, 494 extends approximately 180° around the bypass valve 20.Accordingly, the bypass location 498 of the first guide feature 492 isgenerally vertically aligned with the filtering location 500 of thesecond guide feature 494.

Proximate to the filtering location 500, each guide feature 492, 494defines a stop wall 502. The stop wall 502 of the first guide feature492 and the bypass location 498 of the second guide feature 494 featuredefine a retaining space 504. The stop wall 502 of the second guidefeature 494 and the bypass location 498 of the first guide feature 492define a retaining space 504 on the opposing side of the bypass valve20. This stop wall 502 prevents inadvertent operation of the bypassvalve 20 as well as improper installation of the filter unit 10.

The bypass location 498 may have several configurations. As illustratedin FIG. 28 , each bypass location 498 may have a vertical wall 506adjacent to the retaining space 504. After the vertical wall 506, eachguide feature 492, 494 may continue to slope along the bypass valve 20.The vertical wall 506 may be advantageous for preventing rotation of thebypass valve 20 without sufficient axial movement.

Alternatively, as illustrated in FIG. 29 , the bypass location 498 ofthe guide features 492, 494 include a chamfered edge 508 that extendsinto the sloped surface 496. The chamfered edge 508 may be advantageousfor promoting the sliding engagement of the bypass valve 20 with thefluid manifold 22. These features are incorporated to provide aconsistent and repeatable installation and removal procedure for eachfilter unit 10 and all replacement filter units 10 that are used duringthe life of the appliance 40 (FIG. 45 ). The consistent and repeatableoperation of the filter unit 10 results in a similarly consistent andrepeatable operation that limits damage and wear of the fluid manifold22.

Referring to FIGS. 31-34 , the fluid manifold 22 defines protrusions520, 522 that extend into the bypass valve cavity 322 to interact withthe bypass valve 20 or aspects thereof as discussed herein. While onlyone protrusion 520 is illustrated, it is contemplated that the secondprotrusion 522 is substantially similar (see FIG. 34 ). The protrusions520, 522 may be aligned with and extend from the same sides of the fluidmanifold 22 as the retaining features 256, 258. The protrusions 520, 522extend from opposing sides of the fluid manifold 22 and into the bypassvalve cavity 322 toward one another. The protrusions 520, 522 havechamfered corners 524 on one side and rounded corners 526 on theopposing side for slidably engaging the bypass valve 20. Otherconfigurations and positions of the protrusions 520, 522 arecontemplated without departing from the teachings herein.

Referring to FIGS. 33 and 34 , when the bypass valve 20 is in the bypassposition 374, the protrusions 520, 522 of the fluid manifold 22 aredisposed within the retaining spaces 504 adjacent to the ledge 490 andproximate to the bypass location 498 of the guide features 492, 494. Theprotrusions 520, 522 are disposed vertically below the stop walls 502 ofthe guide features 492, 494. While only one side of the bypass valve 20is illustrated, it is contemplated that the opposing side issubstantially similar to the illustrated configuration.

As illustrated in FIG. 33 , the protrusion 520 of the fluid manifold 22is illustrated abutting the stop wall 502. If the bypass valve 20 ismoved axially without rotational movement, the protrusion 520 of thefluid manifold 22 abuts the respective stop wall 502. Any further axialmovement of the bypass valve 20 is prevented by the engagement of theprotrusion 520 with the stop wall 502. The protrusion 522 is configuredto engage the opposing stop wall 502 in a substantially similar manner.Generally, axial movement in a range of about 1 mm to about 2 mm isallowed until the protrusions 520, 522 engage the respective stop walls502. These motion control features are used to ensure the consistent andrepeatable motion of the filter unit 10 as the bypass valve 20 resultsin a repeatable insertion depth of the filter unit 10 and the bypassvalve 20 to limit damage and wear to the fluid manifold 22.

Referring to FIGS. 35-38 , with axial and rotational movement of thebypass valve 20, the stop walls 502 control the movement of the bypassvalve 20. For example, the stop walls 502 may allow rotation in a firstdirection and minimize or prevent rotation in an opposing direction.Further, the stop walls 502 may minimize movement in the axial directionwithout rotating the bypass valve 20. The stop walls 502 and/or thesloped grooves 260, 262 of the fastener 170 interacting with theretaining features 256, 258 may also control the amount of force andpressure that may be exerted on the bypass valve 20 during installationand removal of the filter unit 10. It is also contemplated that thebypass valve 20 may not contact the stop walls 502 during rotation ofthe bypass valve 20. In such examples, the O-rings 398, 400 generallysuspend the bypass valve 20 in the valve cavity 322. Each of the O-ringsdescribed herein may be a sealing member, gasket O-ring, or othercomponents for creating or forming a seal between two components withoutdeparting from the teachings herein.

When the bypass valve 20 is in the bypass position 374, as illustratedin FIG. 35 , the protrusions 520, 522 are disposed within the respectiveretaining spaces 504 proximate to the ledge 490. As bypass valve 20rotates, the guide features 492, 494 adjust so that the protrusions 520,522 are guided out of the retaining space 504 and over the verticalwalls 506 or the chamfered edges 508 of the guide features 492, 494. Theprotrusions 520, 522 move over the sloped surface 496 as the bypassvalve 20 is moved axially and rotated. The protrusions 520, 522 may bespaced from the sloped surface 496 during rotation of the bypass valve20, or alternatively, the sloped surface 496 may slidably engage theprotrusions 520, 522 as the bypass valve 20 rotates. The bypass valve 20continues to move further into the bypass valve cavity 322 due to theactuation by the fastener 170. In moving into the bypass valve cavity322, the bypass valve 20 continues to rotate until the protrusions 520,522 are disposed at the filtering location 500, which coincides withwhen the bypass valve 20 is in the filtering position 480.

When the protrusions 520, 522 are at the filtering location 500 of theguide features 492, 494, as illustrated in FIG. 38 , the protrusions520, 522 are disposed vertically above the retaining spaces 504 from theopposing side of the bypass valve 20. Additionally, when the protrusions520, 522 are at the filtering locations 500, the bypass valve 20 isfully in the filtering position 480, the filter unit 10 is in theinstalled state 454, and the filter unit 10 and the bypass valve 20 areat the proper insertion depth relative to the housing 302 of the fluidmanifold 22. The bypass valve 20 generally rotates up to about 180°. Invarious examples, the bypass valve 20 generally rotates between about500 and about 60° between the bypass position 374 and the filteringposition 480. In certain aspects, the bypass valve 20 rotates about 55°between the bypass position 374 and the filtering position 480.

Referring to FIGS. 40 and 41 , an additional or alternativeconfiguration of the engagement between the bypass valve 20 and thefluid manifold 22 is illustrated. Each guide feature 492, 494 includes acontinuous sloped surface 496 extending from the bypass location 498 tothe filtering location 500, without including the retaining spaces 504and the stop walls 502 as described herein. The guide features 492, 494are each configured as channels 540 with the sloped surface 496 and aretaining surface 542 spaced from the sloped surface 496. The retainingsurface 542 extends parallel to the sloped surface 496 and operates toguide and retain elongated protrusions 544, 546 of the fluid manifold22.

The channels 540 of the bypass valve 20 extend along the bypass valve20. Generally, the channels 540 spiral or extend around the bypass valve20 to allow for the axial and rotational movement of the bypass valve 20within the bypass valve cavity 322. In the illustrated example, theguide features 492, 494 define helical channels 540 that generally forma double helix on the bypass valve 20

The fluid manifold 22 defines elongated protrusions 544, 546 that extendinto the bypass valve cavity 322. The elongated protrusions 544, 546also extend or spiral along the inner surface 402 of the housing 302that defines the bypass valve cavity 322. The sloped and overallconfiguration of the elongated protrusions 544, 546 correspond with theslope and overall configuration of the channels 540. The channels 540are configured to slide over the elongated protrusions 544, 546 as thebypass valve 20 moves. The elongated protrusions 544, 546 may each beconfigured as multiple spaced protrusions to lessen friction as thebypass valve 20 moves relative to the elongated protrusions 544, 546.

Referring to FIGS. 41-44 , the bypass valve 20 is illustrated movingfrom the bypass position 374, as illustrated in FIGS. 41 and 42 , to thefiltering position 480, as illustrated in FIGS. 43 and 44 . Theelongated protrusions 544, 546 remain at least partially within thechannels 540 when the bypass valve 20 is in the bypass position 374, inthe filtering position 480, and rotating between the bypass andfiltering positions 374, 480. The engagement between the elongatedprotrusions 544, 546 and the guide features 492, 494 guides the axialand rotational movement of the bypass valve 20. A pitch of each channel540 is generally about 45°, corresponding with the pitch of the fastener170.

Each elongated protrusion 544, 546 is disposed substantially within therespective channel 540 when the bypass valve 20 is in the bypassposition 374. As the bypass valve 20 is adjusted, the channels 540 areadjusted relative to the elongated protrusions 544, 546. The elongatedprotrusions 544, 546 operate as rails, guiding the rotation of thebypass valve 20. As illustrated in FIG. 43 , when the bypass valve 20 isin the filtering position 480, an end 548 of the elongated protrusions544, 546 remain disposed within the channels 540, while the remainder ofthe elongated protrusions 544, 546 are exposed within the bypass valvecavity 322. The sloped guide features 492, 494 and elongated protrusions544, 546 guide the simultaneous axial and rotational movement of thebypass valve 20. If either one of the axial movement or the rotationalmovement outweighs the other, the movement of the bypass valve 20 may behindered.

Referring to FIGS. 1A-44 , the filter unit 10 is moved along thelongitudinal axis 52 in a first direction 556 toward the fluid manifold22. The filter unit 10 is moved in a direction parallel with the bypassrotational axis 484. The filter unit 10 moves to the engaged state 450where the first and second projections 80, 84 are disposed within theinlet and outlet ports 340, 342 of the fluid manifold 22, respectively.The fastener 170 is moved into the actuator port 388 and the interlock280 engages the end 284 of the bypass valve 20. The fastener 170 isadjusted to align the retaining features 256, 258 with the openings 264of the interface 252.

During operation from the engaged state 450 to the installed state 454,the bypass actuator 18 is configured to rotationally and axially operatethe bypass valve 20 and also axially operate the actuating assembly 50.Generally, the actuating assembly 50 is axially adjusted in a range ofabout 5 mm to about 10 mm along the longitudinal axis 52 in the firstdirection 556 during operation from the engaged state 450 to theinstalled state 454. The user rotates the knob 204 in the firstrotational direction 214, which consequently rotates the fastener 170 ina same direction.

In certain aspects, the filter unit 10 includes a visual feedback thatthe fastener 170 is fully rotated and the filter unit 10 is in theinstalled state 454. In these aspects, the body portion 12 includes afirst indicator 570 on the lobe 54 and the knob 204 includes a secondindicator 572, as illustrated in FIGS. 1A and 1B. When the knob 204 isrotated to move the second indicator 572 adjacent to the first indicator570, the alignment between the indicators 570, 572 provides the visualfeedback that the filter unit 10 is fully installed. In FIGS. 1A and 1B,the indicator 572 on the knob 204 is not disposed adjacent to theindicator 570 on the lobe 54, indicating that the filter unit 10 is notin the installed state 454.

As the fastener 170 rotates, the retaining features 256, 258 slidablyengage the interface 252. The slope or pitch of the sloped grooves 260,262 of the interface 252 pulls the fastener 170, and the filter unit 10,axially toward the fluid manifold 22. With the axial movement of thefilter unit 10, the engaging portion 16 is moved to engage the inletvalve 242 and the outlet valve 244. Upon engagement, the inlet andoutlet valves 242, 244 are moved to the opened positions 466 to allowwater to flow through the filter unit 10.

The sloped grooves 260, 262 adjust relative to the retaining features256, 258 until the retaining features 256, 258 engage the detents 268disposed proximate to the proximal end 190 of the fastener 170. Thedetents 268 operate to retain the retaining features 256, 258 in theselected position along the sloped grooves 260, 262. The engagementbetween the retaining features 256, 258 and the detents 268 alsooperates to secure the filter unit 10 in the installed state 454.Additionally, the retaining features 256, 258 moving into the respectivedetents 268 generally provides a tactile and/or audible feedback thatthe filter unit 10 is fully installed.

Referring still to FIGS. 1A-44 , as the fastener 170 is rotated, thefastener 170 drives the axial and rotational movement of the bypassvalve 20 to move the bypass valve 20 from the bypass position 374 to thefiltering position 480. Accordingly, the fastener 170 selectivelysecures the filter unit 10 to the fluid manifold 22 while driving therotational and axial movement of the bypass valve 20. The rotational andaxial movement may have a direct or proportional relationship, which isgenerally guided by the slope of the guide features 492, 494. Forexample, the rotational and axial movement may have a 1:1 relationship.In such examples, the 1:1 relationship is caused by the guide features492, 494 having the sloped surfaces 496 extending approximately at a 45°slope. The axial rate of movement is directly related to or directlyproportional to the rotational rate of movement of the bypass valve 20,which is generally driven by direct or proportional axial and rotationalmovement of the bypass actuator 18.

In certain aspects, during movement of the bypass valve 20, theprotrusions 520, 522 of the fluid manifold 22 are adjusted out of theretaining spaces 504 and along the sloped surfaces 496 of the guidefeatures 492, 494 of the bypass valve 20 from the bypass location 498 tothe filtering location 500. In additional aspects, the bypass valve 20adjusts the channels 540 relative to the elongated protrusions 544, 546.

Typically, the rotational movement of the bypass valve 20 occurs at asubstantially same rate as the axial movement, which generallycorresponds to a slope angle of 45° relative to the rotational axis 282of the fastener 170. The sloped surfaces 496 of the guide features 492,494 of the bypass valve 20 may have a corresponding slope of about 45°relative to the bypass rotational axis 484 of the bypass valve 20. Ifthe axial movement is faster than the rotational movement, theprotrusions 520, 522 abut the stop walls 502 or the retaining surfaces542, thereby preventing further axial movement. If the rotationalmovement is faster than the axial movement, the protrusions 520, 522will abut the sloped surface 496 of the guide features 492, 494 andprevent further rotation. The rate the fastener 170 rotationally andaxially moves relative to the retaining features 256, 258 generallymatches the rate the bypass valve 20 rotationally and axially movesrelative to the protrusions 520, 522 or the elongated protrusions 544,546. This allows for generally simultaneous axial and rotationalmovement of the fastener 170 and the bypass valve 20.

The bypass valve 20 is moved or adjusted until the bypass valve 20 isfully in the filtering position 480, which coincides with when thefilter unit 10 is in the fully installed state 454. Generally, thebypass valve 20 is axially adjusted in a range of about 5 mm to about 10mm along the bypass rotational axis 484 during operation from the bypassposition 374 to the filtering position 480. While a 45° slope can beused, other slopes can be included within the bypass valve 20 as well asa combination of slopes that can be used to manipulate the bypass valve20 between the bypass position 374 and the filtering position 480.

When in the installed state 454, water flows or travels through thefilter unit 10 rather than the bypass channel 376. Water travels throughthe opened inlet valve 242 of the fluid manifold 22 and through thefilter inlet 82 into the filter unit 10. The water then travels throughthe water filter 14 and through the filter outlet 86 to the openedoutlet valve 244. The detents 268 of the interface 252 operate to retainthe filter unit 10 in the installed state 454 relative to the fluidmanifold 22. Additionally, the detents 268 limit movement of the filterunit 10 in a second direction 558, away from the base 300 of the fluidmanifold 22.

Referring still to FIGS. 1A-44 , to disengage the filter unit 10 fromthe fluid manifold 22, the knob 204 is rotated in the second rotationaldirection 216, which causes rotation of the fastener 170 in the samedirection. The retaining features 256, 258 of the fluid manifold 22 aremoved out of engagement with the detents 268 and along the interface 252toward the distal end 250 of the fastener 170. As the retaining features256, 258 move along the interface 252 of the fastener 170, the filterunit 10 is adjusted axially away from the fluid manifold 22. The filterunit 10 is moved along the longitudinal axis 52 in the second direction558.

As the filter unit 10 is moved in the second direction 558, away fromthe fluid manifold 22, the biasing forces of the first and secondbiasing members 370, 372 adjust the inlet and outlet valves 242, 244 tothe closed positions 350. Additionally, the biasing force of the thirdbiasing member 396 adjusts the bypass valve 20 toward the bypassposition 374. The guide features 492, 494 of the fluid manifold 22travel along the sloped surfaces 496 of the guide features 492, 494 ofthe bypass valve 20. The bypass valve 20 is then in the bypass position374, allowing water to travel through the bypass channel 376. The filterunit 10 may then be moved out of the engaged state 450 and separatedfrom the fluid manifold 22.

With reference to FIGS. 45-48 , the filter assembly 30 may be installedin the appliance 40, such a refrigerator as illustrated in FIG. 45 . Afilter housing 600 may be coupled to an interior 602 of the appliance40, which houses the fluid manifold 22 and receives the filter unit 10.In the illustrated example of FIG. 45 , the filter housing 600 iscoupled to a top surface 604 of an inner liner 606 within arefrigeration compartment of the appliance 40. The tubing 36, 38 extendsfrom the appliance 40 and into the filter housing 600 to provideunfiltered water to the filter assembly 30 and guide filtered water awayfrom the filter assembly 30. The filter housing 600 may be coupled inany practicable location within the appliance 40. Additionally, thefilter assembly 30 may be installed in any household or commercialappliance 40, unit, or structure that utilizes or dispenses filteredwater. Additional features may also be utilized to couple aspects of thefilter assembly 30 to the appliance 40.

In the illustrated configuration, the filter housing 600 includes asolid portion 610 and an open portion 612. The solid portion 610 may beoriented to obscure a majority of the filter assembly 30 from view,while the open portion 612 abuts the appliance 40.

The fluid manifold 22 is positioned within the interior 602 of thefilter housing 600. The tubing 36, 38 extends through an open end 620 ofthe filter housing 600 to couple with the fluid manifold 22.Additionally, the filter housing 600 may include an insertion sleeve 622therein. The insertion sleeve 622 may be a separate component coupledwith the filter housing 600 or integrally formed with the filter housing600. The insertion sleeve 622 couples to the fluid manifold 22. Theinsertion sleeve 622 extends from an insertion end 624 of the filterhousing 600 to the fluid manifold 22 to provide a receiving space 626 toreceive and house the filter unit 10. The insertion sleeve 622 maycouple with the guide member 56 (FIGS. 1A and 1B) or, alternatively, beutilized in lieu of the guide member 56.

Referring still to FIGS. 45-48 , the filter unit 10 is adapted to beinserted along an insertion path 630 into the filter housing 600 toengage the fluid manifold 22. The insertion sleeve 622 generally definesa shape that corresponds with the shape of the filter unit 10 to assistthe user in aligning the filter unit 10 with the fluid manifold 22. Inthe illustrated example, a perimeter of the insertion sleeve 622 definesthe teardrop shape similar to the cross-sectional shape of the filterunit 10. The lobe 54 of the filter unit 10 provides an alignment forinserting the filter unit 10 into the filter housing 600.

As illustrated in FIG. 47 , an interior surface 632 of the insertionsleeve 622 is generally smooth allowing for smooth insertion of thefilter unit 10 into the insertion sleeve 622 of the filter housing 600.The interior surface 632 may abut an outer surface 634 of the filterunit 10, but may not assist in retaining the filter unit 10 in theinsertion sleeve 622. The engagement between the filter unit 10 and thefluid manifold 22 retains the filter unit 10 within the filter housing600, as described further herein.

Referring to FIG. 49 , an additional or alternative configuration of theinsertion sleeve 622 is illustrated. In this configuration, theinsertion sleeve 622 includes projections 640 extending from theinterior surface 632 into an insertion channel. The projections 640 mayassist in securing the filter unit 10 into the filter housing 600. Theprojections 640 may provide a frictional engagement, an interferencefit, or another engagement that assists in holding the filter unit 10 inthe insertion sleeve 622. In certain aspects, the projections 640 may beactuated to extend into the channel defined by the insertion sleeve 622.The actuation may be caused by the insertion of the filter unit 10 or anadditional feature on the filter housing 600. The actuated projections640 may be advantageous for securing the filter unit 10 in the filterhousing 600 without causing friction when inserting or removing thefilter unit 10. The projections 640 may telescope out from the interiorsurface 632, may be spring-loaded, may be rotated into the insertionchannel, or otherwise adjust into the insertion channel to engage theouter surface 634 of the filter unit 10.

Alternatively, the projections 640 may be part of the filter unit 10.The projections 640 may be actuated to adjust away from the outersurface 634 of the filter unit 10 to engage the interior surface 632 ofthe filter housing 600. In such examples, the rotation of the knob 204may cause the projections 640 to telescope, rotate, or otherwise actuatetoward the interior surface 632. The filter housing 600, the fluidmanifold 22, and/or the filter unit 10 may include additional oralternative latching features to secure the filter unit 10 to the fluidmanifold 22. For example, the filter unit 10 may include a latch thatengages the base 300, the housing 302, and/or the guide member 56 of thefluid manifold 22 (FIGS. 1A and 1B).

Referring to FIGS. 46 and 50 , in an additional or alternativeconfiguration, the filter unit 10 is at least two separate componentsthat may be installed separately with the fluid manifold 22. Forexample, the bypass actuator 18 may be separate from the body portion 12of the filter unit 10. The bypass actuator 18 may be inserted into thefluid manifold 22 to engage the bypass valve 20. The knob 204 may beselectively coupled to the first end 232 of the shaft 228 of the bypassactuator 18 to assist in inserting the bypass actuator 18 through thefilter housing 600 to engage the fluid manifold 22. The bypass actuator18 may be rotated and axially adjusted to move the bypass valve 20 tothe filtering position 480 (FIG. 23 ). The bypass valve 20 may beadjusted without the inlet and outlet valves 242, 244 (FIG. 13 ) beingadjusted to the opened positions 466. Accordingly, the water may notflow through the bypass channel 376 or out of the fluid manifold 22.

The body portion 12 of the filter unit 10 may then be inserted into thefilter housing 600 around the bypass actuator 18. The body portion 12defines a receiving aperture 650 and the sleeve 156 (FIG. 3 ) extendingtherethrough, which receive the shaft 228 of the bypass actuator 18 asthe body portion 12 is inserted around the bypass actuator 18. The knob204 may then engage the first end 232 of the bypass actuator 18 toretain the filter unit 10 to the bypass actuator 18. As the body portion12 is inserted axially into the fluid manifold 22, the projections 80,84 engage the inlet and outlet valves 242, 244 (FIG. 13 ), allowing thewater to flow out of the fluid manifold 22 and into the filter unit 10.

Using this multi-component configuration, the filter unit 10 provides atwo-position actuation and activation of the filter assembly 30. Thefirst position is conducted by the bypass actuator 18, which adjusts thebypass valve 20 from the bypass position 374 to the filtering position480. The second position is conducted by the body portion 12 beinginserted into the fluid manifold 22 around the bypass actuator 18 toengage the inlet and outlet valves 242, 244. Engaging the inlet andoutlet valves 242, 244 allows water to flow through the filter unit 10.

Referring to FIGS. 51-55 , the bypass actuator 18 may have a variety ofconfigurations to actuate the bypass valve 20, retain the filter unit 10to the fluid manifold 22, or a combination thereof. For example, asillustrated in FIG. 51 , the bypass actuator 18 includes the shaft 228and a helicopter retention feature 660 coupled to the second end 234.The helicopter retention feature 660 is a narrow, elongated featureconfigured to be moved between the retaining features 256, 258 of thefluid manifold 22 when oriented in a select orientation. The helicopterretention feature 660 is inserted between the retaining features 256,258 and then rotated to extend under the retaining features 256, 258,retaining the bypass actuator 18 to the fluid manifold 22. Thehelicopter retention feature 660 may have features on a surface thereoffor engaging the bypass valve 20, or alternatively, may have asubstantially flat or planar surface.

As illustrated in FIG. 52 , the bypass actuator 18 may include the shaft228 and a spring-loaded retention feature 668. The spring-loadedretention feature 668 is operable between a retracted position 670,shown in solid, and an extended position 672, shown in phantom.Typically, the spring-loaded retention feature 668 is biased toward theextended position 672. The spring-loaded retention feature 668 isconfigured to be in or rotate to the retracted position 670 as thespring-loaded retention feature 668 is moved past the retaining features256, 258. Once past the retaining features 256, 258, the spring-loadedretention feature 668 is configured to extend and/or rotate to theextended position 672 to be disposed under the retaining features 256,258 to retain the bypass actuator 18 to the fluid manifold 22. Thespring-loaded retention feature 668 may have features on a surfacethereof for engaging the bypass valve 20, or alternatively, may have asubstantially flat or planar surface.

Referring to FIG. 53 , in another non-limiting example, the bypassactuator 18 may be configured to axially and rotationally move thebypass valve 20 with axial movement from the bypass actuator 18. In suchexamples, the bypass actuator 18 includes the shaft 228 and a drivingfeature 680 having angled protrusions 682, 684. The angled protrusions682, 684 are configured to extend at angles in opposing directionsrelative to one another or have surfaces extending at angles in opposingdirections relative to one another.

In certain aspects, the angled protrusions 682, 684 may be mirror imagesof one another. The angled protrusions 682, 684 are configured to engagethe end 284 (e.g., the mating feature 488) of the bypass valve 20. Theangled protrusions 682, 684 apply force to the end 284 of the bypassvalve 20 in opposing directions. For example, the first angledprotrusion 682 applies a force at a first angle on the end 284 of thebypass valve 20 and the second angled protrusion 684 applies a force ata second, opposing angle on the end 284 of the bypass valve 20. Theopposing force provided by the angled protrusions 682, 684 as the bypassvalve 20 is axially adjusted causes the rotation of the bypass valve 20.

Referring to FIG. 54 , the bypass actuator 18 may be two separatecomponents, which may also be separate from the body portion 12. Thefastener 170 may be moved to engage the bypass valve 20. The shaft 228,or another tool, may be inserted through the filter housing 600 torotate the fastener 170 and adjust the bypass valve 20 to the filteringposition 480. The shaft 228 may be retained in the filter housing 600and the body portion 12 may be inserted into the filter housing 600around the shaft 228. Alternatively, the tool may be removed from thefilter housing 600 and the body portion 12 may then be inserted into thefilter housing 600 without the shaft 228 extending therethrough. In thisway, the body portion 12 may define the receiving aperture 650 forreceiving the shaft 228 or may have a solid surface between theprojections 80, 84. The adjustment of the bypass valve 20 may beaccomplished prior to the adjustment of the inlet and outlet valves 242,244.

Referring to FIG. 55 , in various examples, certain aspects of thefilter unit 10 may be removable and/or reusable. For example, asillustrated in FIG. 62 , the filter unit 10 may include the body portion12 housing the water filter 14 with the fastener 170 coupled to the bodyportion 12. The water filter 14 may be configured as an insert that canbe replaced in the body portion 12. Additionally or alternatively, thebody portion 12 with the water filter 14 and the fastener 170 may be asingle unit. This may be interchanged to provide a new water filter 14to the filter assembly 30. In such examples, the knob 204 and the shaft228 of the bypass actuator 18 may be a separate unit that can be reusedwith the interchanging filter units 10. The shaft 228 may be inserted inthe body portion 12 to engage the proximal end 190 of the fastener 170to actuate the bypass valve 20.

With reference to FIGS. 1A-55 , the filter assembly 30 utilizes axialand rotational movement of the bypass valve 20, which may be driven byaxial movement of the bypass actuator 18, rotational movement of thebypass actuator 18, or a combination thereof. Additionally, actuation ofthe bypass valve 20 may be in combination with or separate fromactuation of the inlet and outlet valves 242, 244. Further, actuation ofthe bypass valve 20 may be in combination with or separate fromretention of the filter unit 10 to the fluid manifold 22.

With reference to FIGS. 56-63 , various dimensions of features andrelationships between features may be advantageous for actuating theinlet and outlet valves 242, 244, actuating the bypass valve 20, andretaining the filter unit 10 to the fluid manifold 22. Variousmeasurements are described herein, which are merely exemplary, and arenot limiting. Any practicable dimensions and/or relationships may beutilized without departing from the teachings herein.

As previously noted, the filter unit 10 can be positioned in the engagedstate 450. When in the engaged state 450, the first projection 80, whichdefines the filter inlet 82, is disposed within the inlet port 340, thesecond projection 84, which defines the filter outlet 86, is disposed inthe outlet port 342, and the fastener 170 is engaged with the bypassvalve 20. The bypass valve 20 remains in the bypass position 374 in theengaged state 450, and the water flows through the bypass channel 376and not the filter unit 10. The engaged state 450 may have a firstengaged position 700, where the bypass valve 20 is engaged and in thebypass position 374, and a second engaged position 702, where the inletand outlet valves 242, 244 are engaged and in the closed positions 350.

Referring to FIG. 56 , the filter unit 10 is illustrated in the firstengaged position 700 with the fastener 170 initially engaging the bypassvalve 20. It is contemplated that this initial engagement with thebypass valve 20 may be prior to any axial movement or rotation of thebypass valve 20. The distal end 250 of the fastener 170 is spaced adistance A from a bottom 710 of the actuator port 388. The distance Amay be a range between about 5 mm and about 12 mm. In certain aspects,the distance A is about 8.3 mm.

Further, when the fastener 170 initially engages the bypass valve 20 inthe first engaged position 700, the first and second projections 80, 84are spaced from the inlet and outlet valves 242, 244, respectively. Theinlet and outlet valves 242, 244 remain in the closed positions 350. Thedistal ends 88, 90 of the first and second projections 80, 84 are spaceda distance B from the recesses 464 to the tips 346 of the inlet andoutlet valves 242, 244, respectively. The distance B may be a rangebetween about 3 mm and about 10 mm. In certain aspects, the distance Bis about 5.8 mm.

Referring to FIG. 57 , the filter assembly 30 is illustrated in thesecond engaged position 702 where the first and second projections 80,84 abut the inlet and outlet valves 242, 244 while the inlet and outletvalves 242, 244 are still in the closed positions 350. The filter unit10 is moved further into the fluid manifold 22 relative to the firstengaged position 700 (see FIG. 63 ). The bypass valve 20 is axiallyadjusted a distance C between the first engaged position 700(illustrated in phantom) and the second engaged position 702(illustrated in solid). The distance C may be between about 3 mm andabout 10 mm. In a non-limiting example, the distance C may be about 5.8mm.

Additionally, the fastener 170 is adjusted further into the actuatorport 388 to the second engaged position 702. The distal end 250 of thefastener 170 is spaced a distance D from the bottom 710 of the actuatorport 388 when the fastener 170 is in the second engaged position 702.The distance D may be between about 1 mm and about 5 mm. In certainaspects, the distance D may be about 2.4 mm.

Referring to FIG. 58 , the filter assembly 30 is illustrated in theinstalled state 454 where the inlet and outlet valves 242, 244 are inthe opened positions 466 and the bypass valve 20 is in the filteringposition 480. From the first engaged position 700 (illustrated inphantom) to the installed state 454 (illustrated in solid), the bypassvalve 20 is configured to axially move a distance E. The distance E maybe between about 4 mm and about 12 mm. In certain aspects, the distanceE may be about 7.5 mm.

Additionally, the inlet and outlet valves 242, 244 are adjusted adistance F from the closed positions 350 (illustrated in phantom) to theopened positions 466 (illustrated in solid). The distance F may bebetween about 0.5 and about 5 mm. In a non-limiting example, thedistance F is about 1.6 mm.

The tips 346 of the inlet and outlet valves 242, 244 sit within therecesses 464 of the first and second projections 80, 84, respectively.In the installed state 454, the tips 346 are disposed a distance G froma bottom 712 of the inlet and outlet ports 340, 342, respectively. Thedistance G may be in a range between about 0.5 mm and about 5 mm. Incertain aspects, the distance G is about 1.2 mm.

Moreover, when in the installed state 454, the distal end 250 of thefastener 170 is spaced a distance H from the bottom 710 of the actuatorport 388. The distance H may be between about 0.1 mm and about 3 mm. Ina non-limiting example, the distance H may be about 0.8 mm.

Additionally, when in the installed state 454, the O-rings 452 on thefirst and second projections 80, 84 are spaced a distance I from theO-rings 378 on the respective inlet and outlet valves 242, 244. Thedistance I may be between about 10 mm and about 20 mm. In non-limitingexamples, the distance I may be about 15.8 mm. Further, the O-rings 378on the inlet and outlet valves 242, 244 are spaced a distance J from anopening 714 of the inlet and outlet ports 340, 342, respectively. Thedistance J may be between about 15 mm and about 25 mm. In certainaspects, the distance J is about 19.4 mm.

Additionally, the O-rings 452 on the projections 80, 84 are spaced adistance K from the tips 346 of the inlet and outlet valves 242, 244,respectively, when the filter unit 10 is in the installed state 454. Thedistance K may be in a range between about 5 mm and about 12 mm. Incertain aspects, the distance K is about 7.9 mm.

Referring to FIG. 59 , a top plan view of the fluid manifold 22 isillustrated. The tips 346 of the inlet and outlet valves 242, 244 arespaced a distance L from one another. Generally, the distance L extendsbetween a center point of each tip 346. The distance L may be between 30mm and about 50 mm. In certain aspects, the distance L may be about 40mm.

Additionally, a center axis 720 generally extends along a longitudinalextent of the retaining features 256, 258 and separates the inlet valve242 from the outlet valve 244. Further, a line 722 extends between thetip 346 of the inlet valve 242 and the tip 346 of the outlet valve 244and along a longitudinal extent of the mating feature 488 of the bypassvalve 20. An angle α is defined between the center axis 720 and the line722, such that the retaining features 256, 258 extend generallyperpendicular to the line 722 extending between the inlet and outletvalves 242, 244 (e.g., the angle α is about 90°). Additionally, theretaining features 256, 258 generally extend perpendicularly relative tothe longitudinal extent of the mating feature 488 in the bypass position374.

Referring to FIG. 60 , the actuator port 388 is illustrated. Theactuator port 388 generally defines a circular cross-sectional shapehaving a diameter M. The diameter M may be between about 10 mm and about20 mm. In certain aspects, the diameter M is about 15 mm. In otherconfigurations of the fluid manifold 22, the measurement M may be awidth of the actuator port 388, but may not be a diameter.

Referring to FIG. 61 , one of the sloped grooves 260 of the fastener 170is illustrated. It is contemplated that the second sloped groove 262(FIG. 9 ) is substantially similar or identical to the sloped groove260. The sloped groove 260 extends a distance N from the distal end 250of the fastener 170. The distance N extends between the distal end 250of the fastener 170 and an upper surface 726 of the sloped groove 260closest to the proximal end 190 of the fastener 170 (e.g., generallyadjacent to the detent 268). The distance N may be between about 8 mmand about 20 mm. In certain aspects, the distance N may be about 13.1mm.

Additionally, a distance O extends between the distal end 250 of thefastener 170 and a lower surface 728 of the sloped groove 260 at thepoint closest to the proximal end 190 of the fastener 170 (e.g.,generally adjacent to the detent 268). The distance O may be betweenabout 5 mm and about 15 mm. The distance O may be about 9.4 mm.

A height P of the sloped grooves 260 or a distance P between the upperand lower surfaces 726, 728 may be in a range between 1 mm and about 7mm. In certain aspects, the distance P is about 3.8 mm. A depth Q of thesloped groove 260 may be the distance between an outer surface 730 ofthe fastener 170 and an inner surface 732 of the sloped groove 260. Thedepth Q may be between about 1 mm and about 10 mm. The depth Q may beabout 4.0 mm. The configuration of the fastener 170 allows for thefastener 170 to rotate about 180° from the engaged state 450 to theinstalled state 454.

The pitch R of the sloped groove 260 generally refers to spacing betweenthe adjacent portions of the sloped groove 260. The pitch R may be in arange between about 15 mm and about 25 mm. In certain aspects, the pitchR is about 20 mm. Further, a slope S of the sloped groove 260 may be anangle γ defined by an x-axis and a y-axis. The slope S may be in a rangebetween about 25° and about 50°. In certain aspects, the slope S may beabout 34.0°.

Referring to FIG. 62 , the interlock 280 of the fastener 170 isillustrated in phantom. The interlock 280 extends from the distal end250 into an interior of the fastener 170. The interlock 280 generallyextends a depth T into the fastener 170. The depth T may be betweenabout 0.5 mm and about 5 mm. In certain aspects, the depth T is about3.0 mm. In various examples, the interlock 280 has a central portion 740that extends a greater distance U from the distal end 250. The distanceU may be between about 0.5 mm and about 5 mm. The distance S may beabout 3.5 mm. The central portion 740 may be advantageous for engagingwith different configurations of the mating feature 488 of the bypassvalve 20 (FIG. 27 ).

Referring to FIG. 63 , the retaining features 256, 258 are illustratedengaging the fastener 170 when the fastener 170 is in the installedstate 454. The retaining features 256, 258 extend a distance V into theactuator port 388. The distance V may be between about 1 mm and about 8mm. The distance V may be about 3.9 mm. The retaining features 256, 258extend a distance W into the fastener 170 (e.g., into the sloped grooves260, 262, respectively). The distance W may be between about 1 mm andabout 6 mm. In certain aspects, the distance W is about 3.5 mm. Ends 750of the retaining features 256, 258 are spaced a distance Z from theinner surface 732 of the sloped grooves 260, 262, respectively. Thedistance Z may be between about 0.1 mm and about 3 mm. In a non-limitingexample, the distance Z is about 0.5 mm. Further, the ends 750 arespaced a distance AA from one another. The distance AA may be betweenabout 1 mm and about 15 mm. The distance AA may be about 7.0 mm.

These measurements described herein are exemplary to illustrate variousrelationships within the filter assembly 30. However, each of thesemeasurements may be any practicable measurement for the filter unit 10to be installed in the fluid manifold 22 and actuate the inlet andvalves 242, 244 and the bypass valve 20.

Referring to FIG. 64 , and with further reference to FIGS. 1A-63 , amethod 800 of installing the filter unit 10 includes step 802 ofproviding the appliance 40 or structure with the fluid manifold 22. Thefluid manifold 22 may be installed in the appliance 40 in anypracticable manner that provides space for insertion of the filter unit10. In step 802, the body portion 12 is provided and coupled with theengaging portion 16. The water filter 14 is inserted into the bodyportion 16. In step 804, the bypass actuator 18 is inserted through thewater filter 14 and, consequently, through the body portion 12. Incertain aspects, the bypass actuator 18 is also inserted through theengaging portion 16. Additionally or alternatively, in step 806, thefirst retainer 100 is disposed proximate to the first end 58 of the bodyportion 12. The second retainer 102 is disposed proximate the second end60 of the body portion 12 and an edge or rim of the engaging portion 16so the water filter 14 and a space housing the water filter 14 is sealedwith respect to the engaging portion 16.

In step 808, the filter unit 10 is aligned with the filter housing 600.In certain aspects, the filter unit 10 includes the locating feature,which is exemplified herein as the lobe 54. The filter housing 600and/or the insertion sleeve 622 defines a shape or configuration thataligns with the locating feature to indicate proper alignment of thefilter unit 10 with the filter housing 600 and, consequently, the fluidmanifold 22.

In step 810, the filter unit 10 is inserted into the filter housing 600to be in the engaged state 450. The filter unit 10 is moved through theinsertion sleeve 622 to abut the fluid manifold 22, without actuation ofthe valve assembly 24. Accordingly, the filter unit 10 is moved to theengaged state 450. Any latching features or the projections 640 on theinsertion sleeve 622 or the filter unit 10 may be actuated or adjustedto assist in securing the filter unit 10.

In step 812, the bypass actuator 18 is rotated to move the filter unit10 to the installed state 454. The bypass actuator 18 is rotated withrespect to the water filter 14, the body portion 12, and the engagingportion 16 to axially engage the engaging portion 16 with the valveassembly 24 of the fluid manifold 22. During this movement, the fastener170 engages the bypass valve 20 to move the bypass valve 20 from thebypass position 374 to the filtering position 480. Additionally, thefirst and second projections 80, 84 engage the inlet and outlet valves242, 244 to move the inlet and outlet valves 242, 244 to the openedpositions 466. In the installed state 454, the filter unit 10 allowsfluid, such as water, to flow through the filter unit 10 (e.g., throughthe water filter 14) to be filtered and then flow out of the filter unit10 into the tubing 38.

Referring to FIG. 65 , and with further reference to FIGS. 1A-63 , amethod 830 of filtering water with the filter unit 10 includes step 832of aligning the filter unit 10 with the filter housing 600. The locatingfeature (e.g., the lobe 54) on the filter unit 10 is aligned with theinsertion sleeve 622 of the filter housing 600, which is shaped tocomplement the filter unit 10. Further, the first indicator 570 on thebody portion 12 may be aligned with the second indicator 572 on the knob204. In step 834, the filter unit 10 is inserted into the filter housing600 to the engaged state 450. Any latching features or the projections640 on the insertion sleeve 622 or the filter unit 10 may be actuated oradjusted to assist in securing the filter unit 10.

In step 836, the bypass actuator 18 is rotated to move the filter unit10 from the engaged state 450 to the installed state 454. The filterunit 10 is axially adjusted toward the fluid manifold 22. In step 838,the bypass valve 20 is moved from the bypass position 374 to thefiltering position 480. Generally, the bypass valve 20 is rotated andmoved axially within the fluid manifold 22 to move between the bypassposition 374 and the filtering position 480. In step 840, the inlet andoutlet valves 242, 244 are moved to the opened positions 466 to allowfluid to flow between the filter unit 10 and the fluid manifold 22. Instep 842, water is filtered by the filter unit 10. The water flows froma source through the tubing 36, through the fluid manifold 22, throughthe filter inlet 82 of the filter unit 10, and into the body portion 12.The water flows through the water filter 14 to be filtered. Oncefiltered, the water flows through the filter outlet 86 of the filterunit 10, through the fluid manifold 22, and through the tubing 38 to anend location.

To remove the filter unit 10 from the fluid manifold 22, in step 844,the bypass valve 20 is adjusted from the filtering position 480 to thebypass position 374. The water flowing through the fluid manifold 22 isgenerally diverted through the bypass channel 376. In step 846, theinlet and outlet valves 242, 244 are adjusted to the closed positions350. In step 848, the bypass actuator 18 is rotated to adjust the filterunit 10 from the installed state 454 to the engaged state 450. In step850, the filter unit 10 is disengaged from the fluid manifold 22 andremoved from the filter housing 600. It is understood that the steps ofthe methods 800, 830 may be performed in any order, simultaneously,independently, repeated, and/or omitted without departing from theteachings herein. Moreover, the methods 800, 830 may be performed incombination and/or independently.

The filter unit 10 disclosed herein is a pressure vessel for filteringfluid, which has a void extending through the body portion 12 thereof.The void or sleeve 156 extends through the entire body portion 12 toprovide a space for the shaft 228 to engage the fastener 170. In variousaspects, the sleeve 156 forms a solid wall, separating a space withinthe sleeve 156 from a space within the body portion 12 and outside ofthe sleeve 156. In such examples, the sleeve 156 defines a dry channelor void for the shaft 228 where fluid generally does not flow through.

In additional or alternative examples, the sleeve 156 may allow fluidcommunication between the space within the sleeve 156 and the spaceinside the body portion 12 and outside the sleeve 156. In such examples,the sleeve 156 defines a wet channel that receives the shaft 228 andallows fluid to flow therethrough. The sleeve 156 may be utilized todefine the space for the water filter 14. Further, the sleeve 156 mayseparate the water filter 14 from the shaft 228, reducing potentialinterference with the rotation of the shaft 228 and, consequently, thebypass actuator 18. Alternatively, when the filter unit 10 includes thewet channel, the sleeve 156 may not be included in the filter unit 10.In such examples, the wet channel for the shaft 228 may be defined bythe water filter 14.

Referring to FIGS. 1A-73B, the filter unit 10 is configured to engagethe fluid manifold 22 to filter water. The bypass actuator 18 isconfigured to engage the fluid manifold 22 to retain the filter unit 10in the installed state 454, move the bypass valve 20 to the filteringposition 480, and axially move the filter unit 10 relative to the fluidmanifold 22 for the projections 80, 84 to engage the inlet and outletvalves 242, 244. Typically, the projections 80, 84 respectively engagethe inlet and outlet valves 242, 244. The bypass actuator 18 includes avariety of configurations and can be assembled as a single unit with thebody portion 12 or as a separate feature. Further, the bypass actuator18 may be a single unit or separate features. The filter unit 10 alsoincludes various features, such as the lobe 54 and the indicators 570,572, to assist the user in aligning the filter unit 10 with the fluidmanifold 22. The filter unit 10 may be utilized in any practicabledevice or system for filtering water or fluid.

Use of the device of this disclosure may provide for a variety ofadvantages. For example, the engagement between the filter unit 10 andthe fluid manifold 22 may provide a more precise initiation of filteringwater through a slower opening of the inlet valve 242 and the outletvalve 244. This also may provide a better and/or more intuitive consumerexperience through the installation and removal of the filter unit 10.Further, the fastener 170 engages the fluid manifold 22 and retains thefilter unit 10 to the fluid manifold 22. Additionally, the filter unit10 may have a more stable connection with the fluid manifold 22 as thereare fewer moving components to provide the engagement. Moreover, theguide features 492, 494 of the bypass valve 20 operate to guide therotational and axial motion of the bypass valve 20 driven by thefastener 170, which may help avoid filtering that is not intended orother undesired leakage. Additionally, the axial motion of the filterunit 10 relative to the fluid manifold 22 provides increased sealingbetween the fluid manifold 22 and the filter unit 10. Also, thesubstantially concurrent activation of the inlet valve 242, the outletvalve 244, and the bypass valve 20 minimizes leaks from installing thefilter unit 10 into the fluid manifold 22. Additional benefits andadvantages may be realized and/or achieved.

The device disclosed herein is further summarized in the followingparagraphs and is further characterized by combinations of any and allof the various aspects described therein.

According to another aspect of the present disclosure, a filter unitincludes a body portion that receives a water filter. An engagingportion is coupled to the body portion. A bypass actuator rotatesrelative to the engaging portion to rotationally and axially operate abypass valve of a fluid manifold. The bypass actuator drives axialengagement of the engaging portion with a valve assembly of the fluidmanifold. The bypass actuator extends through the body portion and theengaging portion.

According to another aspect, the bypass actuator rotates relative to thebody portion.

According to yet another aspect, a sleeve extends through the bodyportion. The bypass actuator extends through the sleeve.

According to another aspect, the engaging portion includes a firstprojection defining an inlet and a second projection defining an outlet.The first projection and the second projection are configured to engagethe valve assembly.

According to another aspect, the bypass actuator is disposed between andspaced from the inlet and the outlet.

According to another aspect, the bypass actuator, the inlet, and theoutlet define a collinear arrangement.

According to another aspect of the present disclosure, a filter unitincludes a bypass actuator configured to selectively engage a bypassvalve of a fluid manifold. The bypass actuator is rotationally operableto drive each of a rotational motion of the bypass valve about a bypassrotational axis and an axial motion of the bypass valve along the bypassrotational axis. An engaging portion selectively cooperates with arotational operation of the bypass actuator to axially engage a valveassembly of the fluid manifold in a direction parallel with the bypassrotational axis. The filter unit also includes a body portion. Thebypass actuator is rotationally operable with respect to the bodyportion. The engaging portion is fixed with respect to the body portion.

According to another aspect, a bypass actuator is independentlyrotatable relative to an engaging portion and a body portion.

According to another aspect, a bypass actuator includes opposingretention structures that axially retain a bypass actuator relative to abody portion.

According to another aspect, a bypass actuator defines an interface forengaging a retaining feature of a fluid manifold.

According to another aspect, an interface includes a helical section.

According to another aspect, an engaging portion includes a projectiondefining an inlet.

According to another aspect, a bypass actuator extends through a bodyportion.

According to another aspect, a body portion receives a water filter. Abypass actuator extends through the water filter.

According to another aspect of the present disclosure, a filter unitincludes an actuating assembly configured to selectively engage a fluidmanifold in an engaged state. A bypass actuator is configured toselectively engage the fluid manifold when in the engaged state. Thebypass actuator is rotationally operable relative to the actuatingassembly. Rotation of the bypass actuator in the engaged state isconfigured to operate a bypass valve of the fluid manifold and alsoaxially operate the actuating assembly relative to the valve assemblyduring operation from the engaged state to an installed state.

According to another aspect, a bypass actuator is axially fixed withrespect to an actuating assembly.

According to another aspect, a bypass actuator is configured to abut abypass valve in a mating engagement.

According to another aspect, an actuating assembly includes an engagingportion coupled to a body portion.

According to another aspect, a bypass actuator defines an interface forengaging a retaining feature of a fluid manifold. The interface includesa helical section.

According to another aspect, an interface includes a detent to retain abypass actuator relative to a retaining feature of a fluid manifold.

According to another aspect, rotation of a bypass valve of a fluidmanifold is configured to axially operate a bypass valve

According to another aspect, rotation of a bypass actuator is configuredto rotationally and axially operate a bypass valve.

According to another aspect, a filter unit is used with an appliancehaving a manifold assembly including one or more valves for control offluid passing through the manifold assembly. The filter unit includes asubstantially cylindrical body portion extending between a first end anda second end along a longitudinal axis. The first end is configured tobe selectively inserted along the longitudinal axis towards the manifoldassembly of the appliance. An inlet extension projects from the firstend and is associated with an inlet valve of the manifold assembly. Anoutlet extension projects from the first end and is associated with anoutlet valve of the manifold assembly. An actuator assembly extends fromthe first end along the longitudinal axis and is disposed between theinlet extension and outlet extension. The actuator assembly isconfigured to engage a bypass valve located within a recess in themanifold assembly when the first end is selectively inserted towards themanifold assembly. The actuator assembly includes a receptacleconfigured to secure the body portion to the manifold assembly to resistmovement along the longitudinal axis.

According to another aspect, an actuator assembly is configured torotate with respect to a first end.

According to another aspect, an actuator assembly is configured torotate with respect to a first end to cause rotational motion of abypass valve in a manifold assembly.

According to another aspect, an actuator assembly is configured torotate with respect to a first end to secure a body portion to amanifold assembly and to resist movement along a longitudinal axis.

According to another aspect, a receptacle includes a groove thatcooperates with a retainer formed in a manifold assembly.

According to another aspect, a groove is a helical shape that cooperateswith a retainer projecting from a surface of a manifold assembly.

According to another aspect, a groove includes a detent to receive aretainer formed in a manifold assembly.

According to another aspect, a first end further includes a gasket whichcooperates with a manifold assembly to form a seal which separates aninlet to a water filter from an outlet of a water filter.

According to another aspect, an actuator assembly extends through a bodyportion, a water filter, and to a second end.

According to another aspect, a filter unit for use in an applianceincluding a manifold assembly with a bypass valve includes a bodyportion that houses a water filter and has a first end for insertiontowards the manifold assembly. The first end is configured to, when thefirst end is inserted into the manifold assembly, engage a valveassembly and resist rotational movement of the first end with respect tothe manifold assembly. A bypass actuator is disposed at the first endand rotates with respect to the first end. The bypass actuator isconfigured to, when the first end is inserted into the manifoldassembly, drive rotational and axial motion of the bypass valve of themanifold assembly.

According to another aspect, a first end includes an inlet extensionassociated with an inlet valve of a manifold assembly. The first endincludes a first opening to allow water to flow from the inlet valve ofa manifold assembly into a water filter. The inlet extension resistsrotational movement of the first end with respect to the manifoldassembly when inserted therein.

According to another aspect, a first end includes an outlet extensionassociated with an outlet valve of a manifold assembly. The first endincludes a second opening to allow water to flow from an inlet valve ofthe manifold assembly into a water filter. An inlet extension resistsrotational movement of the first end with respect to the manifoldassembly when inserted therein.

According to another aspect, a gasket is disposed on a first end toseparate an inlet valve of a manifold assembly from an outlet valve ofthe manifold assembly.

According to another aspect, a gasket is disposed on an inlet extensionand a second gasket is disposed on an outlet extension to separate aninlet valve of a manifold assembly from an outlet valve of the manifoldassembly by creating one or more seals therebetween.

According to another aspect, a knob is proximate a second end of a bodyportion and operatively connected to a bypass actuator.

According to another aspect, a bypass actuator, an inlet extension, andan outlet extension each project from a first end of a body portion byat least 1 cm in a same direction.

According to another aspect, a body portion includes a symmetrical planethat intersects an inlet extension, an outlet extension, and a bypassactuator.

According to another aspect, a bypass actuator includes an interlock forcooperating with a bypass valve in a manifold assembly.

According to another aspect, a bypass actuator includes a fastener whichis configured to retain a first end to a manifold assembly.

According to another aspect, a filter unit includes an actuatingassembly configured to selectively engage a fluid manifold in an engagedstate. Fluid is configured to flow through a bypass channel of the fluidmanifold when the actuating assembly is in the engaged state. Theactuating assembly is configured to house a filter media. A bypassactuator extends through the actuating assembly and is configured toselectively engage the fluid manifold when in the engaged state. Thebypass actuator is rotationally operable relative to the actuatingassembly. Rotation of the bypass actuator in the engaged state isconfigured to operate a bypass valve of the fluid manifold and alsoaxially operate the actuating assembly relative to a valve assembly ofthe fluid manifold during operation from the engaged state to aninstalled state. The fluid is configured to flow through the filtermedia when the actuating assembly is in the installed state.

According to another aspect, a rotatable fastener is also configured todrive rotational and axial movement of a bypass valve in a manifoldassembly while the rotatable fastener is selectively securing a bodyportion to a manifold assembly.

According to another aspect, an extension is configured to activate avalve of a manifold assembly while a rotatable fastener is selectivelysecuring a body portion to a manifold assembly.

According to another aspect, a rotatable fastener includes at least areceptacle configured to secure a body portion to a manifold assembly toresist movement in a second direction.

According to another aspect, a rotatable fastener extends from anelongated body portion and at least partially into a recess located in amanifold assembly that includes a bypass valve.

According to another aspect, an extension includes an opening for fluidpassage between a manifold and a water filter.

According to another aspect, a filter unit includes a body portion thatreceives a water filter and a fluid directing end coupled to the bodyportion. The fluid directing end includes a fluid inlet configured toreceive water from a water source and a fluid outlet configured to expelthe water from said filter unit. A bypass actuator extends through thebody portion. The bypass actuator has an actuating end positionedbetween the fluid inlet and the fluid outlet and an operating endpositioned at an opposing end of the body portion. The bypass actuatoris rotationally operable about a rotational axis relative to the fluidinlet and the fluid outlet. A reference plane extends through the fluidinlet and the fluid outlet and includes the rotational axis of thebypass actuator. The actuating end of the bypass actuator includes asloped channel having a receiving section that intersects the referenceplane at an engaging portion of the reference plane. Rotation of thebypass actuator translates the sloped channel through the referenceplane from the engaging portion to an installed portion of the referenceplane. The axial distance from the engaging portion to the installedportion represents an insertion depth of the fluid inlet and the fluidoutlet relative to the water source.

According to another aspect, a filter unit includes an actuatingassembly that has a body portion defining a hollow interior for housinga water filter. The body portion includes a first end and a second end.The actuating assembly also includes a fluid delivery portion coupled tothe second end of the body portion. The fluid delivery portion includesa first projection defining an inlet and a second projection defining anoutlet. The first projection is spaced from the second projection. Abypass actuator extends through the actuating assembly. The bypassactuator includes a knob disposed proximate the first end of the bodyportion and a fastener disposed within the space defined between thefirst projection and the second projection. The fastener rotatesrelative to the fluid portion end. The fastener, the first projection,and the second projection define a collinear arrangement. The fastenerdefines at least one sloped groove extending from a distal end toward aproximal end of the fastener. The bypass actuator also includes a shaftcoupling the knob and the fastener. Rotation of the knob causes rotationof the fastener. The shaft extends through the hollow interior of thebody portion.

According to another aspect, a first end of a body portion includes arecessed region defining a receiving space. A knob is disposed at leastpartially within the receiving space.

According to another aspect, a body portion includes a lobe extendingalong a length thereof.

According to another aspect, a fastener includes a radial flange. Acover is disposed proximate to the radial flange and is coupled to afluid delivery portion to retain the fastener in an axial positionrelative to the fluid delivery portion.

According to another aspect, a fluid delivery portion includes a sleevethat extends into a hollow interior of a body portion.

According to another aspect, a shaft extends through a sleeve.

According to another aspect, at least one sloped groove includes a firstsloped groove and a second sloped groove. An opening of the first slopedgroove at a distal end is on an opposing side of a fastener relative toan opening of the second sloped groove.

According to another aspect, each of a first sloped groove and a secondsloped groove include a helical section.

According to another aspect, a filter unit includes a body portion thatreceives a water filter. An engaging portion is coupled to the bodyportion. A bypass actuator has an operating end and a fastener. Theoperating end causes rotation of the fastener to rotationally andaxially operate a bypass valve of a fluid manifold. The bypass actuatoris configured to drive axial engagement of the engaging portion with avalve assembly of the fluid manifold. The bypass actuator extendsthrough the body portion and the engaging portion.

According to another aspect, rotational motion of an operating endcauses rotation of a fastener.

According to another aspect of the present disclosure, a filter unitincludes a body portion that receives a water filter. An engagingportion is coupled to the body portion. A bypass actuator moves relativeto the engaging portion to rotationally and axially operate a bypassvalve of a fluid manifold. The bypass actuator drives axial engagementof the engaging portion with a valve assembly of the fluid manifold. Thebypass actuator extends through the body portion and the engagingportion.

According to another aspect, a bypass actuator is configured to drivedirect rotational and axial movement of a bypass valve.

According to another aspect, a bypass actuator is configured to driveproportional rotational and axial movement of a bypass valve.

According to another aspect, proportional rotational and axial movementof a bypass valve is configured to be a 1:1 relationship driven by abypass actuator.

According to another aspect, a bypass actuator is configured to drivesimultaneous rotational and axial movement of a bypass valve.

According to another aspect, a bypass actuator for a filter unitincludes a shaft having a first end and a second end. A fastener has aproximal end and a distal end. The proximal end of the fastener iscoupled to the first end of the shaft. The fastener defines slopedgrooves that extend from the distal end toward the proximal end forreceiving retaining features of a fluid manifold, and wherein eachsloped groove includes a helical section.

According to another aspect, a method of installing a filter unitincludes inserting a water filter section into a filter unit bodyportion having an engaging portion; inserting a bypass actuator throughthe water filter section, the filter unit body portion, and the engagingportion; and rotating the bypass actuator with respect to the waterfilter section and the engaging portion to axially engage the engagingportion with a valve assembly of a fluid manifold. The water filtersection has a first retainer that is disposed proximate a first end ofthe body portion and a second retainer disposed proximate a second endof the body portion and a rim of the engaging portion so that the waterfilter section is sealed with respect to the engaging portion.

It will be understood by one having ordinary skill in the art thatconstruction of the described disclosure and other components is notlimited to any specific material. Other exemplary embodiments of thedisclosure disclosed herein may be formed from a wide variety ofmaterials, unless described otherwise herein.

For purposes of this disclosure, the term “coupled” (in all of itsforms, couple, coupling, coupled, etc.) generally means the joining oftwo components (electrical or mechanical) directly or indirectly to oneanother. Such joining may be stationary in nature or movable in nature.Such joining may be achieved with the two components (electrical ormechanical) and any additional intermediate members being integrallyformed as a single unitary body with one another or with the twocomponents. Such joining may be permanent in nature or may be removableor releasable in nature unless otherwise stated.

It is also important to note that the construction and arrangement ofthe elements of the disclosure as shown in the exemplary embodiments isillustrative only. Although only a few embodiments of the presentinnovations have been described in detail in this disclosure, thoseskilled in the art who review this disclosure will readily appreciatethat many modifications are possible (e.g., variations in sizes,dimensions, structures, shapes, and proportions of the various elements,values of parameters, mounting arrangements, use of materials, colors,orientations, etc.) without materially departing from the novelteachings and advantages of the subject matter recited. For example,elements shown as integrally formed may be constructed of multiple partsor elements shown as multiple parts may be integrally formed, theoperation of the interfaces may be reversed or otherwise varied, thelength or width of the structures and/or members or connector or otherelements of the system may be varied, the nature or number of adjustmentpositions provided between the elements may be varied. It should benoted that the elements and/or assemblies of the system may beconstructed from any of a wide variety of materials that providesufficient strength or durability, in any of a wide variety of colors,textures, and combinations. Accordingly, all such modifications areintended to be included within the scope of the present innovations.Other substitutions, modifications, changes, and omissions may be madein the design, operating conditions, and arrangement of the desired andother exemplary embodiments without departing from the spirit of thepresent innovations.

It will be understood that any described processes or steps withindescribed processes may be combined with other disclosed processes orsteps to form structures within the scope of the present disclosure. Theexemplary structures and processes disclosed herein are for illustrativepurposes and are not to be construed as limiting.

What is claimed is:
 1. A filter unit, comprising: a body portionconfigured to receive a water filter; an engaging portion coupled to thebody portion, wherein the engaging portion includes: a first projectiondefining an inlet; and a second projection defining an outlet; and abypass actuator extending through the body portion and the engagingportion, wherein the bypass actuator includes: an actuating endpositioned between the inlet and the outlet, wherein the actuating enddefines an interlock for engaging a bypass valve of a fluid manifold andan interface for engaging retaining features of the fluid manifold, andwherein the interface includes a helical section; an operating endpositioned at an opposing end of the body portion relative to theactuating end, wherein rotation of the operating end causes rotation ofthe actuating end; and a shaft coupled to the actuating end and theoperating end, wherein the bypass actuator is configured to rotaterelative to the engaging portion and the body portion to rotationallyand axially operate the bypass valve, and wherein the bypass actuator isfurther configured to drive axial engagement of the engaging portionwith a valve assembly of the fluid manifold.
 2. The filter unit of claim1, wherein the engaging portion is configured to selectively engage thefluid manifold in an engaged state, and wherein fluid is configured toflow through a bypass channel of the fluid manifold when the engagingportion is in the engaged state, and wherein rotation of the bypassactuator in the engaged state is configured to operate the bypass valveof the fluid manifold and also axially operate the engaging portionrelative to the valve assembly during operation from the engaged stateto an installed state, and further wherein the fluid is configured toflow through the water filter when the engaging portion is in theinstalled state.
 3. The filter unit of claim 1, wherein the bypassactuator, the inlet, and the outlet define a collinear arrangement. 4.The filter unit of claim 1, wherein the bypass actuator is independentlyrotatable relative to the engaging portion and the body portion, andwherein the engaging portion is fixed with respect to the body portion.5. The filter unit of claim 1, further comprising: a sleeve extendingthrough the body portion, wherein the bypass actuator extends throughthe sleeve.
 6. The filter unit of claim 1, wherein the bypass actuatoris axially fixed with respect to the engaging portion and the bodyportion.
 7. The filter unit of claim 1, wherein the operating endincludes a knob, and wherein the actuating end includes a fastener. 8.The filter unit of claim 7, wherein the fastener defines a sloped grooveextending from a distal end toward a proximal end of the fastener, andwherein the sloped groove includes the helical section.
 9. The filterunit of claim 7, wherein the fastener includes a radial flange, andwherein a cover is disposed proximate to the radial flange and iscoupled to the engaging portion to retain the fastener in an axialposition relative to the engaging portion.
 10. The filter unit of claim7, wherein the fastener defines a first sloped groove and a secondsloped groove, wherein an opening of the first sloped groove at a distalend of the fastener is on an opposing side of the fastener relative toan opening of the second sloped groove.
 11. The filter unit of claim 1,wherein the body portion includes a lobe extending along a lengththereof.
 12. The filter unit of claim 1, wherein the bypass actuator isconfigured to drive simultaneous and proportional rotational and axialmovement of the bypass valve.
 13. The filter unit of claim 2, whereinthe operating end includes a knob, and wherein the actuating endincludes a fastener.
 14. The filter unit of claim 13, wherein thefastener defines a first sloped groove and a second sloped groove,wherein an opening of the first sloped groove at a distal end of thefastener is on an opposing side of the fastener relative to an openingof the second sloped groove.
 15. The filter unit of claim 14, whereinthe bypass actuator is independently rotatable relative to the engagingportion and the body portion, and wherein the engaging portion is fixedwith respect to the body portion.
 16. The filter unit of claim 15,wherein the bypass actuator is axially fixed with respect to theengaging portion and the body portion.
 17. The filter unit of claim 16,wherein the bypass actuator is configured to drive simultaneous andproportional rotational and axial movement of the bypass valve.
 18. Thefilter unit of claim 17, wherein the bypass actuator, the inlet, and theoutlet define a collinear arrangement.
 19. The filter unit of claim 18,further comprising: a sleeve extending through the body portion, whereinthe bypass actuator extends through the sleeve.
 20. The filter unit ofclaim 19, wherein the body portion includes a lobe extending along alength thereof.